Evaluate ∫0π/2sin4(x)dx\int_0^{\pi/2} \sin^4(x) dx∫0π/2sin4(x)dx.
3π16\frac{3\pi}{16}163π
π4\frac{\pi}{4}4π
38\frac{3}{8}83
π8\frac{\pi}{8}8π