Convert ellipsoid from cartesian to spherical equation

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SUMMARY

The discussion focuses on converting an ellipsoid defined by the equation \(\frac{x^2}{a^2} + \frac{y^2}{b^2} + \frac{z^2}{c^2} = 1\) into spherical coordinates. The user initially expresses confusion regarding the applicability of spherical coordinate formulas, specifically \(x = \rho \sin \phi \cos \theta\), \(y = \rho \sin \phi \sin \theta\), and \(z = \rho \cos \phi\). However, through guidance, they correctly derive the transformations as \(x = a \sin \phi \cos \theta\), \(y = b \sin \phi \sin \theta\), and \(z = c \cos \phi\), leading to the conclusion that \(\rho^2 = a^2 \sin^2 \phi \cos^2 \theta + b^2 \sin^2 \phi \sin^2 \theta + c^2 \cos^2 \phi\).

PREREQUISITES
  • Understanding of Cartesian and spherical coordinate systems
  • Familiarity with ellipsoid equations
  • Basic knowledge of trigonometric functions
  • Experience with calculus, particularly in three dimensions
NEXT STEPS
  • Study the derivation of spherical coordinates from ellipsoidal equations
  • Learn about the applications of ellipsoids in physics and engineering
  • Explore advanced topics in multivariable calculus, focusing on coordinate transformations
  • Investigate numerical methods for converting between coordinate systems
USEFUL FOR

Students and professionals in mathematics, physics, and engineering who are working with coordinate transformations, particularly those dealing with ellipsoids and their applications in various fields.

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Homework Statement



In order to advance on a problem I'm working, I need to covert this ellipsoid from cartesian to spherical coordinates.
\frac{x^2}{a^2} +\frac{y^2}{b^2} +\frac{z^2}{c^2} = 1

Homework Equations



x^2 +y^2+z^2= \rho ^2
x=\rho sin \phi cos \theta
y= \rho sin \phi sin \theta
z= \rho cos \phi

The Attempt at a Solution



I'm not sure how to use those formulas because they look like they would only work with a sphere. I don't know. It's been a semester since calc three and we didn't do spherical coordinates anyway. What do I do?
 
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using what I foud here: http://math.wikia.com/wiki/Ellipsoid

would I have
x=asin\phi cos \theta
y=bsin \phi sin \theta
z= ccos\phi

Thus, \rho ^2= a^2 sin^2 \phi cos^2 \theta + b^2 sin^2 \phi sin ^2 \theta + c^2 cos ^2 \phi ?
 
Looks like you've solved it! :)
 

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