Im trying to solve these two equations by elimination. But im stuck at this point. This is for a Diff Equation class and i just cant recall some of the trig rules.

$\displaystyle -4cos(2x)-2sin(2x)p(x)+cos(2x)q(x)=0$

$\displaystyle -4sin(2x)+2cos(2x)p(x)+sin(2x)q(x)=0$

Any help is appreciated. Thanks