3.5 cos(x) + 2 cos (y) = 4

3.5 sin (x) = 2 sin (y) + 0.5

I already have the final answer which are x=36.87 and y=53.13

I need to know how they solved it.

thanks!!

oh and i've tried everything. adding them,dividing them,multiplying with cos(x),sin(x)..etc everything!;/