- #1

pimanian

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There's a point (x0,y0,z0) in 3D. There is a line on the X-Y plane. This line is say theta degrees (0 - 360) about the Y-axxis. If the point (x0, y0, z0) is rotated phi degrees about this line, what is the new position?

This is just a problem I thought up, so I don't even know if there is enough information to solve it.

Please help me, let me know what's a good step to solve it? Should I use Cartesian system, or use another one?

Thanks!