Rectangular to spherical equation calculator

Show Your Love: The Spherical Equivalent Calculator is a handy tool used primarily in optometry and ophthalmology to simplify the prescription of corrective lenses. This tool calculates the spherical equivalent (SE) of a lens prescription, providing a single value that represents the combined effect of the sphere and cylinder powers of the lens.

Rectangular to spherical equation calculator. This paper derives a formula for rectangular planar spiral coils with an aspect ratio of up to 4.0 and having a cross-sec-tional aspect ratio of height to width not exceeding unity. It is based on physical principles, hence scalable and valid for any dimension and inductance range.

Find a rectangular equation for the graph represented by the spherical equation \displaystyle{ \rho = 2 \cos(\phi). } Convert the rectangular equation x^2 + y^2 = 6y to an equation in (a) cylindrical coordinates and (b) spherical coordinates. Find a rectangular equation for the graph represented by the spherical question = 2 cos .

a. The variable θ represents the measure of the same angle in both the cylindrical and spherical coordinate systems. Points with coordinates (ρ, π 3, φ) lie on the plane that forms angle θ = π 3 with the positive x -axis. Because ρ > 0, the surface described by equation θ = π 3 is the half-plane shown in Figure 5.7.13.This video provides 4 examples on how to write a spherical equation in rectangular form.http://mathispower4u.com1. Calculate the Radial Distance r r: It is the distance from the origin to the point. It can be found using the Pythagorean theorem: r = √x2+y2+z2 r = x 2 + y 2 + z 2. 2. Calculate the Polar Angle θ θ: It is measured from the positive x-axis. The tangent of this angle is the ratio of y y to x x, and it can be found using the arctangent ...Find step-by-step Calculus solutions and your answer to the following textbook question: Convert the rectangular equation to \ Spherical coordinates. \ $$ x^2+y^2=16 $$. Fresh features from the #1 AI-enhanced learning platform.The spherical coordinate system is defined with respect to the Cartesian system in Figure 4.4.1. The spherical system uses r, the distance measured from the origin; θ, the angle measured from the + z axis toward the z = 0 plane; and ϕ, the angle measured in a plane of constant z, identical to ϕ in the cylindrical system.

This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: b. Find an equation in rectangular coordinates for the spherical coordinate equation and identify the surface: p = csc phi csc Theta. Here's the best way to solve it.Another useful coordinate system known as polar coordinates describes a point in space as an angle of rotation around the origin and a radius from the origin. Thinking about this in terms of a vector: Cartesian coordinate—the x,y components of a vector. Polar coordinate—the magnitude (length) and direction (angle) of a vector.represents an ellipsoid centered at the origin in Cartesian coordinates. To express this equation in cylindrical coordinates, you can substitute x x and y y with their equivalent cylindrical coordinates, r ⋅ cos(θ) r ⋅ cos. ( θ), respectively. The equation becomes: ( θ)) 2 + 4 z 2 = 10. r2 + 4z2 = 10. r 2 + 4 z 2 = 10.Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry ... Symbolab is the best step by step calculator for a wide range of physics problems, including ...We can transform from Cartesian coordinates to spherical coordinates using right triangles, trigonometry, and the Pythagorean theorem. Cartesian coordinates are written in the form ( x, y, z ), while spherical coordinates have the form ( ρ, θ, φ ). In this form, ρ is the distance from the origin to a three-dimensional point, θ is the angle ...formula of Spherical Coordinates to Cartesian Calculator. Here are the formulas for converting spherical coordinates (ρ, θ, φ) to Cartesian coordinates (x, y, z): …7. Conversions between Coordinate Systems. In general, the conversion of a vector F. Fx i F y ˆ j Fz k ˆ from Cartesian coordinates. x , y , z to another orthonormal coordinate system u , v , w in 3 (where “orthonormal” means that the new basis vectors u ˆ , v ˆ , w ˆ are mutually orthogonal and of unit length) is given by.The problem is that the expression with spherical unit vectors does not take into account the coordinates of the point. In other words, $\hat n=(1,0,0)$ for every $(r,\theta,\phi)$. So, my second approach was calculate it via parametrization of the sphere.

Feb 17, 2019 · Find an equation in rectangular coordinates for the equation given in spherical coordinates: ϕ = π/6 ϕ = π / 6. Equation must be such that z ≥ 0 z ≥ 0. Here is what I did: and since z must be greater than or equal to zero: where the $\cdot$ is the term within the parentheses in the first equation above. Note that, in addition to the mixed-coordinate derivatives ($\partial r/\partial x$, etc), you'll need to compute the derivative of a product of functions.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. cartesian equation. Save Copy. Log InorSign Up. x 2 3 + y 2 3 = a 2 − b 2 a 2 3 ...Converting rectangular coordinates to cylindrical coordinates and vice versa is straightforward, provided you remember how to deal with polar coordinates. To convert from cylindrical coordinates to rectangular, use the following set of formulas: \begin {aligned} x &= r\cos θ\ y &= r\sin θ\ z &= z \end {aligned} x y z = r cosθ = r sinθ = z.The Spherical to Cartesian formula calculates the cartesian coordinates Vector in 3D for a vector give its Spherical coordinates. INSTRUCTIONS: Choose units and enter the following: (ρ) magnitude of vector (Θ) polar angle (angle from z-axis) (φ) azimuth angle (angle from x-axis) Cartesian Coordinates (x, y, z): The calculator returns the cartesian coordinates as real numbers.Converting rectangular coordinates to cylindrical coordinates and vice versa is straightforward, provided you remember how to deal with polar coordinates. To convert from cylindrical coordinates to rectangular, use the following set of formulas: \begin {aligned} x &= r\cos θ\ y &= r\sin θ\ z &= z \end {aligned} x y z = r cosθ = r sinθ = z.

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Our rectangular to spherical equation calculator is simple to use. Just input the x, y, and z coordinates of the point you want to convert, and the calculator will …Spherical coordinates are useful for triple integrals over regions that are symmetric with respect to the origin. Figure \(\PageIndex{6}\): The spherical coordinate system locates points with …When you visit the graphing calculator, you will find the expression list on the left and a grid on the right. In the expression list, you can enter coordinates, expressions, equations, and more. Try entering a point like (1,3) ( 1, 3), graphing a line like y = −2x+4 y = − 2 x + 4, or graphing a parabola like y =x2+1 y = x 2 + 1.ρ = 999.7 kg/m³. Find the dynamic viscosity: µ = 0.001308 kg/ (m · s) Compute the product of the density of water, the velocity of the flow, and L: ρ × u × L = 249.925 (m · s)/kg. Divide the result by the dynamic viscosity to find the Reynolds number: ReD = 249.925/.001308 = 191,074 The flow is likely turbulent.So, to convert a rectangular equation to a spherical equation, substitute the expressions for x, y, and z in terms of r, theta, and phi into the equation. ... Calculate to the nearest. Richard asked his friends how many siblings they each have. Their responses were: 4, 1, 1, 2, and 2. What was the mean number of siblings? 6) 7 Find the surface ...Convert from rectangular to spherical coordinates. (-3/2, root 3/2, 1) (p, theta, phi) = (2, -pi/6, pi/3) This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer See Answer See Answer done loading.

This video provides an example of how to convert Cartesian coordinates or rectangular coordinates to spherical coordinates.http://mathispower4u.comINSTRUCTIONS: Enter the following: Spherical Coordinates (ρ,θ,?): The calculator returns the magnitude of the vector (ρ) as a real number, and the azimuth angle from the x-axis (?) and the polar angle from the z-axis (θ) as degrees. However, these can be automatically converted to compatible units via the pull-down menu.Wolfram|Alpha Natural Language Understanding Curated Data & Knowledge Dynamic Algorithmic Computation Computed Visual Computation. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics ...Pasternack's Waveguide Calculator provides the cutoff frequency, operating frequency range and closest waveguide size for a rectangular waveguide based on the custom inputted broad wall width. Note: If you select a waveguide size from the dropdown below, the broad wall width will be automatically calculated along with the other results.Calculations at a spherical triangle (Euler triangle). The spherical triangle doesn't belong to the Euclidean, but to the spherical geometry. The three sides are parts of great circles, every angle is smaller than 180°, all together are larger than 180°. Enter radius and three angles and choose the number of decimal places. Then click Calculate.Vector calculator. This calculator performs all vector operations in two and three dimensional space. You can add, subtract, find length, find vector projections, find dot and cross product of two vectors. For each operation, calculator writes a step-by-step, easy to understand explanation on how the work has been done. Vectors 2D Vectors 3D.Use Calculator to Convert Cylindrical to Rectangular Coordinates. 1 - Enter r r, θ θ and z z and press the button "Convert". You may also change the number of decimal places as needed; it has to be a positive integer. Angle θ θ may be …A polar equation to rectangular equation calculator serves the same purpose as the previous calculator but with a different name. It allows you to input a polar equation and converts it into the equivalent rectangular equation. Example: Consider the polar equation r = 3cos(θ). Converting this equation using the calculator would yield the ...Converting Rectangular Equations to Cylindrical EquationsIn this video I'll show you how to convert rectangular equations to cylindrical equations. There are...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Interactive, free online graphing calculator from GeoGebra: graph functions, plot data, drag sliders, and much more! Is It a good idea to refinance your mortgage? Use our mortgage refinance calculator to determine how much you could save today. Is It a good idea to refinance your mortgage? Use ou...

More than just an online triple integral solver. Wolfram|Alpha is a great tool for calculating indefinite and definite triple integrals. Compute volumes, integrate densities and calculate three-dimensional integrals in a variety of coordinate systems using Wolfram|Alpha's triple integral calculator. Learn more about:

Set up integrals in both rectangular coordinates and spherical coordinates that would give the volume of the exact same region. Exercise 13.2.8 The temperature at each point in space of a solid occupying the region {\(D\)}, which is the upper portion of the ball of radius 4 centered at the origin, is given by \(T(x,y,z) = \sin(xy+z)\text{.}\)Vector Calculator VUVUVECTORS in 3D. Related Items: dot productscalar productinner product·. Note. cross productvector productabab. abbaabcabac. Right Hand Convention. VUαUV. V UVUVU.Set up integrals in both rectangular coordinates and spherical coordinates that would give the volume of the exact same region. Exercise 13.2.8 The temperature at each point in space of a solid occupying the region {\(D\)}, which is the upper portion of the ball of radius 4 centered at the origin, is given by \(T(x,y,z) = \sin(xy+z)\text{.}\)Our rectangular to spherical equation calculator is simple to use. Just input the x, y, and z coordinates of the point you want to convert, and the calculator will …Spherical cap volume calculation. The spherical cap, also called the spherical dome, is a portion of a sphere cut off by a plane. The formula behind its volume is: volume = ((π × h²) / 3) × (3r - h) or: volume = (1/6) × π × h × (3a² + h²) where the radius of the sphere is r, the height of the cap (the blue one) is h, and a is the ...Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry ... Symbolab is the best step by step calculator for a wide range of physics problems, including ...This calculator can be used to convert 2-dimensional (2D) or 3-dimensional cartesian coordinates to its equivalent cylindrical coordinates. If desired to convert a 2D cartesian coordinate, then the user just enters values into the X and Y form fields and leaves the 3rd field, the Z field, blank. Z will will then have a value of 0.Spherical coordinates have the form (ρ, θ, φ), where, ρ is the distance from the origin to the point, θ is the angle in the xy plane with respect to the x-axis and φ is the angle with respect to the z-axis.These coordinates can be transformed to Cartesian coordinates using right triangles and trigonometry. We use the sine and cosine functions to find the vertical and horizontal ...

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This video provides an example of how to convert Cartesian coordinates or rectangular coordinates to spherical coordinates.http://mathispower4u.comSpherical coordinate system. This system defines a point in 3d space with 3 real values - radius ρ, azimuth angle φ, and polar angle θ. Azimuth angle φ is the same as the azimuth angle in the cylindrical coordinate system. Radius ρ - is a distance between coordinate system origin and the point. Positive semi-axis z and radius from the ...C = circumference. π = pi = 3.1415926535898. √ = square root. This online calculator will calculate the 3 unknown values of a sphere given any 1 known variable including radius r, surface area A, volume V and circumference C. It will also give the answers for volume, surface area and circumference in terms of PI π.The time-dependent Schrödinger equation is given by iℏ∂Ψ ∂t = − ℏ2 2m∇2Ψ + VΨ. Here Ψ(r, t) is the wave function, which determines the quantum state of a particle of mass m subject to a (time independent) …Aug 26, 2023 · 1. Calculate the Radial Distance r r: It is the distance from the origin to the point. It can be found using the Pythagorean theorem: r = √x2+y2+z2 r = x 2 + y 2 + z 2. 2. Calculate the Polar Angle θ θ: It is measured from the positive x-axis. The tangent of this angle is the ratio of y y to x x, and it can be found using the arctangent ... The spherical harmonics Y_l^m(theta,phi) are the angular portion of the solution to Laplace's equation in spherical coordinates where azimuthal symmetry is not present. Some care must be taken in identifying the notational convention being used. In this entry, theta is taken as the polar (colatitudinal) coordinate with theta in [0,pi], and phi as the azimuthal (longitudinal) coordinate with ...An emergency fund can be a lifesaver if you lose your job. Use my emergency fund calculator to see how much you should have saved. An emergency fund can be a lifesaver if you lose ...In spherical coordinates, we likewise often view \(\rho\) as a function of \(\theta\) and \(\phi\text{,}\) thus viewing distance from the origin as a function of two key angles. In the following activity, we explore several basic equations in spherical coordinates and the surfaces they generate. Activity 3.7.5 ….

Rectangle calc: find A (area) As we know the formula for the area of a rectangle A = a × b, let's show with an example how you can calculate that property: Choose the length of the rectangle - for example, a = 5 cm. Decide on the rectangle's width - for example, b = 6 cm. Multiply these two values: A = 5 cm × 6 cm = 30 cm².i. Cartesian equation: d2C D dx2 − kC = 0 Solution: √ x +Be−k C = Ae D x or: D k k C = Acosh x +Bsinh x D D ii. Cylindrical and spherical solutions involve Bessel functions, but here are the equations: d dC D r − krC = 0 dr dr dC D d r2 − kr2C = 0 dr dr 2. Unsteady solutions without generation based on the Cartesian equation with ...The physics convention.Spherical coordinates (r, θ, φ) as commonly used: (ISO 80000-2:2019): radial distance r (slant distance to origin), polar angle θ (angle with respect to positive polar axis), and azimuthal angle φ (angle of rotation from the initial meridian plane). This is the convention followed in this article. In mathematics, a spherical coordinate …a. The variable θ represents the measure of the same angle in both the cylindrical and spherical coordinate systems. Points with coordinates (ρ, π 3, φ) lie on the plane that forms angle θ = π 3 with the positive x -axis. Because ρ > 0, the surface described by equation θ = π 3 is the half-plane shown in Figure 5.7.13.Use Calculator to Convert Cylindrical to Spherical Coordinates. 1 - Enter r r, θ θ and z z and press the button "Convert". You may also change the number of decimal places as needed; it has to be a positive integer. Angle θ θ may be entered in radians and degrees. r = r =.To use the calculator, all you need to do is enter the x, y, and z coordinates of the point in the designated fields. Once you’ve entered the values, click the …The azimuthal angle is denoted by. φ ∈ [ 0 , 2 π ] {\displaystyle \varphi \in [0,2\pi ]} : it is the angle between the x -axis and the projection of the radial vector onto the xy -plane. The function atan2 (y, x) can be used instead of the mathematical function arctan (y/x) owing to its domain and image. The classical arctan function has an ...I think your method is correct (of converting first to cylindrical, and then to spherical), but you did make one mistake. Here I will convert directly to spherical from Cartesian using the transformation: Rectangular to spherical equation calculator, In spherical coordinates, we likewise often view \(\rho\) as a function of \(\theta\) and \(\phi\text{,}\) thus viewing distance from the origin as a function of two key angles. In the following activity, we explore several basic equations in spherical coordinates and the surfaces they generate. Activity 3.7.5, The Equation of a Sphere Calculator works by taking in the inputs and calculating the radius and the center value between the sphere. The following Equation of a Sphere is used to calculate the radius and center value of the sphere: x 2 + y 2 + z 2 = r 2. Where: x, y, z = the coordinates of the sphere. r = radius of the sphere., Convert Spherical Equations to Rectangular Equations, Example: Find an equation in spherical coordinates for the cone surface represented by a rectangular equation, x 2 + y 2 = z 2. Solution: Substituting the values of x, y, and z, we have. r 2 sin 2 θ cos 2 Φ + r 2 sin 2 θ sin 2 Φ = r 2 cos 2 θ. r 2 sin 2 θ (cos 2 Φ + sin 2 Φ) = r 2 cos 2 θ. r 2 sin 2 θ = r 2 cos 2 θ (Here r ≥ 0) tan ..., Get the free "Coordinates: Rectangular to Polar" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Mathematics widgets in Wolfram|Alpha. , Adam McCann, WalletHub Financial WriterAug 15, 2022 Deciding on a place to call home can be a tough process. You’ll need to balance things like the cost of living with job opportun..., Get the free "Parametric equation solver and plotter" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Mathematics widgets in Wolfram|Alpha., I have this equation $$\rho^2=2 \sin(2\theta)\cos(\phi)$$ and I want to convert it into a Cartesian equation. I’ve already applied an trigonometric identity and I have this$$\rho^2=4\sin(\theta)\cos(\ ... Converting from Cartesian …, Total volume of a cylinder shaped tank is the area, A, of the circular end times the length, l. A = π r 2 where r is the radius which is equal to 1/2 the diameter or d/2. Therefore: V(tank) = π r 2 l Calculate the filled volume of a horizontal cylinder tank by first finding the area, A, of a circular segment and multiplying it by the length, l., Spherical Integral Calculator. This widget will evaluate a spherical integral. If you have Cartesian coordinates, convert them and multiply by rho^2sin (phi). To Covert: x=rhosin (phi)cos (theta) y=rhosin (phi)sin (theta) z=rhosin (phi) Get the free "Spherical Integral Calculator" widget for your website, blog, Wordpress, Blogger, or iGoogle. , Spherical coordinates, also called spherical polar coordinates (Walton 1967, Arfken 1985), are a system of curvilinear coordinates that are natural for describing positions on a sphere or spheroid. Define theta to be the azimuthal angle in the xy-plane from the x-axis with 0<=theta<2pi (denoted lambda when referred to as the longitude), phi to be the polar angle (also known as the zenith angle ..., INSTRUCTIONS: Enter the following: Spherical Coordinates (ρ,θ,?): The calculator returns the magnitude of the vector (ρ) as a real number, and the azimuth angle from the …, Free online 3D grapher from GeoGebra: graph 3D functions, plot surfaces, construct solids and much more!, Consider the equation ρ=1−cosϕ. (a) How can you describe this surface? (b) Write this equation in rectangular coordinates.What is the equation in Cartesian (rectangular) coordinates equivalent to this equation in spherical coordinates? Consider. There are 2 steps to solve this one., This spherical coordinates converter/calculator converts the rectangular (or cartesian) coordinates of a unit to its equivalent value in spherical coordinates, according to the formulas shown above. Rectangular coordinates are depicted by 3 values, (X, Y, Z). When converted into spherical coordinates, the new values will be depicted as (r, θ ..., Question: Find a rectangular equation for the surface whose spherical equation is p=2sin(phi)sin(theta). Find a rectangular equation for the surface whose spherical equation is p=2sin(phi)sin(theta). There are 3 steps to solve this one. Who are the experts? Experts have been vetted by Chegg as specialists in this subject., formula of Spherical Coordinates to Cartesian Calculator. Here are the formulas for converting spherical coordinates (ρ, θ, φ) to Cartesian coordinates (x, y, z): x = ρ sin(φ) cos(θ) y = ρ sin(φ) sin(θ) z = ρ cos(φ) where: ρ (rho) is the radial distance from the origin. θ (theta) is the polar angle, ranging from 0 to 2π., This video provides an example of how to convert Cartesian coordinates or rectangular coordinates to spherical coordinates.http://mathispower4u.com, Spherical \((\rho, \theta, \phi)\): Rotational symmetry in three-dimensions. Together we will work through several examples of how to evaluate a triple integral in spherical coordinates and how to convert to spherical coordinates to find the volume of a solid. Let’s jump right in. Video Tutorial w/ Full Lesson & Detailed Examples (Video), spherical coordinates for {2,1,-2} free particle in 4D in hyperspherical coordinates; polar coordinates; coordinate geometry; laplace r^2 sin(phi + theta), Click on the specific calculator you need. Input. Type or paste your data into the fields provided. Ensure that your data is entered correctly to get accurate results. Calculation. Once the data is entered, click the "Calculate" button. Result. The calculator will display the result instantly. To solve another problem, modify the existing input., The purpose of converting a spherical equation to rectangular is to make it easier to graph and visualize in the Cartesian coordinate system. It also allows for easier calculation of distances and angles between points in three-dimensional space. 3. Can a spherical equation be converted to rectangular for any type of shape?, This video provides 4 examples on how to write a spherical equation in rectangular form.http://mathispower4u.com, PyKonal is a new open-source Python package for computing travel times and tracing ray paths in 2D or 3D heterogeneous media using the fast marching method for solving the eikonal equation in spherical and Cartesian coordinates. This article introduces PyKonal: a new open-source Python package for computing travel times and tracing ray paths in 2D or 3D heterogeneous media using the fast ..., In fact, $ x=r\cos\theta\sin\phi $, $ y=r\sin\theta\sin\phi $ and $ z=r\cos\phi $ were actually used in deriving the expressions for transformation from spherical to cartesian by considering the case of r=1 or in our notations $ \rho=1 $ within the three dimensions of a part of a sphere (1/8)th it's total volume., Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate ... Ordinary Differential Equations Calculator, Exact Differential Equations. In the previous posts, we have covered three types ..., To use the calculator, all you need to do is enter the x, y, and z coordinates of the point in the designated fields. Once you’ve entered the values, click the ‘Calculate’ button, and the calculator will provide you with the corresponding spherical coordinates (r, θ, φ) for the point. It’s that easy!, Pasternack's Waveguide Calculator provides the cutoff frequency, operating frequency range and closest waveguide size for a rectangular waveguide based on the custom inputted broad wall width. Note: If you select a waveguide size from the dropdown below, the broad wall width will be automatically calculated along with the other results., Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry Solid Geometry Conic Sections ... complex-equation-calculator. en. Related Symbolab blog posts. High ..., To solve a system of equations by elimination, write the system of equations in standard form: ax + by = c, and multiply one or both of the equations by a constant so that the coefficients of one of the variables are opposite. Then, add or subtract the two equations to eliminate one of the variables., the y-axis goes through (0,90); and the z-axis goes through the poles. The conversion is: x = R * cos(lat) * cos(lon) y = R * cos(lat) * sin(lon) z = R *sin(lat) Where R is the approximate radius of earth (e.g. 6371 km). If your trigonometric functions expect radians (which they probably do), you will need to convert your longitude and latitude ..., Conversion between Rectangular and Spherical Coordinates. The following equations define the relationships between rectangular coordinates and the (az,el,R) representation used in Phased Array System Toolbox software. To convert rectangular coordinates to (az,el,R):, An emergency fund can be a lifesaver if you lose your job. Use my emergency fund calculator to see how much you should have saved. An emergency fund can be a lifesaver if you lose ...