use the difference formula for sine on the left side ...
btw, this one ain't pretty ...
I it get down to
I need help solving the following equation for all values between 0 and 360 degrees:
sin (60 degrees - x) = 2sinx
Normally I would set the equation to zero and factor out sin, but if I move over 2sinx it isn't possible to factor out the sin x because of the stuff in the parentheses. That's where I'm stuck.