Evaluate the integral I=∫0π/4tan3(θ)cos2(θ)dθI = \int_{0}^{\pi/4} \frac{\tan^3(\theta)}{\cos^2(\theta)} d\thetaI=∫0π/4cos2(θ)tan3(θ)dθ.
1/41/41/4
1/21/21/2
1/31/31/3
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