Question: Change coords, from cylindrical or spherical to cartesian


If I have several equation where some of them are given in cartesian and some in spherical I would want to work with all surfaces in cartesian coordinates. Just since that is the coordinate system i´m most familiar with.

I have cheked and tried: ChangeOfVariables, changecoords and ?coords

All of those are great recourses, but they wont let me change from [r,theta,phi],cartesian[x,y,z] How can I obtain that in maple?

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