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**1. The problem statement, all variables and given/known data**

I worked a physics problem and the answer came down to solving these two equations and I am stuck.

**2. Relevant equations**

2 equations and two unknowns.

sin(x) = (2/3)sin(y)

1 + cos(x) = (2/3) cos(y)

**3. The attempt at a solution**

I tried this and it went nowhere..

z =sin^-1[(2/3)sin(y)]- cos^-1[(2/3)cos(y) -1]

and set this to zero to solve for y.

This did not seem to work so there must be a better way.

Suggestions??

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