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## Homework Statement

Solve for the unit vectors x-hat and y-hat in terms of r-hat and phi-hat.

## Homework Equations

r-hat=cos(phi)x-hat+sin(phi)y-hat

phi-hat=cos(phi)y-hat-sin(phi)x-hat,

## The Attempt at a Solution

I have been working on this for a really long time, and I keep getting a really complicated expression for x-hat, with everything over cos(phi)^2. That seems wrong, and I can't figure out how to solve it from only those two given equations.