Evaluate the integral I=∫0π/2sinn(x)cosm(x)dxI = \int_0^{\pi/2} \sin^n(x) \cos^m(x) dxI=∫0π/2sinn(x)cosm(x)dx for n=3,m=3n=3, m=3n=3,m=3.
1/121/121/12
1/61/61/6
1/241/241/24
1/81/81/8