Question

Trying to solve this system of equations. Not sure where I am messing up.

I have

\[\frac{a_1 p_1}{\cos{\theta_1}}=\frac{a_2 p_2}{\cos{\theta_2}}\]

and \[\frac{\sin{\theta_1}}{a_1}=\frac{\sin{\theta_2}}{a_2}\]

I want to solve for \(\theta_1\)