integral dari (cos x - sin x)² dx = .....

InTegraL

Misal :
A = (cos x - sin x)²
A = cos² x + sin² x - 2 sin x cos x
A = 1 - sin 2x

∫A dx
= ∫(1 - sin 2x) dx
= ∫dx - ∫sin 2x dx
= x + 1/2 ∫dcos 2x
= x + 1/2 cos 2x + C