Hi, I have two equations each which two variables:

x*cos (30) - 275*cos(a) = 0

x*(sin 30) + 275*sin(a) - 300 = 0

I tried solving for the unknowns but eventually I end up with this equation and get stuck.

158.77*cos(a) + 275*sin(a) - 300 = 0

Can someone help me with this? I'm not very good at trigonometric identities...