Find the average value of f(θ)=tan2(θ)f(\theta) = \tan^2(\theta)f(θ)=tan2(θ) on the interval [0,π/4][0, \pi/4][0,π/4].
4π(1−π4)\frac{4}{\pi}(1 - \frac{\pi}{4})π4(1−4π)
4π(1+π4)\frac{4}{\pi}(1 + \frac{\pi}{4})π4(1+4π)
4π−1\frac{4}{\pi} - 1π4−1
1−4π1 - \frac{4}{\pi}1−π4