cos(3x+a)−3sin(3x+a)=2sin(3x+a+5π6) cos(\sqrt{3}x+a)-\sqrt{3} sin(\sqrt{3}x+a)= 2sin(\sqrt{3}x+a+\dfrac{5\pi}{6})cos(3x+a)−3sin(3x+a)=2sin(3x+a+65π)
