Evaluate ∫0π/4tan2(x)dx\int_0^{\pi/4} \tan^2(x) dx∫0π/4tan2(x)dx.
1−π/41 - \pi/41−π/4
π/4−1\pi/4 - 1π/4−1
1+π/41 + \pi/41+π/4
π/2−1\pi/2 - 1π/2−1