Evaluate ∫0π/2cos5(x)sin(x)dx\int_{0}^{\pi/2} \cos^5(x) \sin(x) dx∫0π/2cos5(x)sin(x)dx using the substitution u=cos(x)u = \cos(x)u=cos(x).
1/61/61/6
1/51/51/5
1/41/41/4
1/31/31/3