- #1
Niles
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Homework Statement
I have two coordinate system [itex](x, y)[/itex], [itex](x', y')[/itex] that differ by a rotation around the [itex]z[/itex]-axis by an angle [itex]\alpha[/itex]. In the coordinate system [itex](x', y')[/itex] I have a function [itex]f(x', y') = C[/itex], where [itex]C[/itex] is a constant.
I would like to express [itex]f[/itex] in the coordinate system [itex](x,y)[/itex], where it is a linear function [itex]x\nabla +y_0[/itex]. The gradient [itex]\nabla[/itex] of this function is [itex]1/\tan(\alpha)[/itex].
The Attempt at a Solution
I need to find the shift in [itex]x[/itex] now. I get that this is [itex]C/\cos(\alpha)[/itex]. Is there a way for me to test that this function indeed is constant in the coordinate system [itex](x', y')[/itex]?