5. \int_0^{\frac{\pi}{2}} \sin^7 \theta \cos^5 \theta \ d\theta 6. \int_0^{2\pi} \sin^2(\frac{1}{3}\theta) \ d\theta 7. \int_0^{\frac{\pi}{2}} \cos^5 x \ dx 8. \int_0^a \frac{dx}{(a^2+x^2)^{\frac{3}{2}}}, \quad a>0.
Added by Jamie C.
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Step 1: For the first integral, we can use the trigonometric identity $\sin^2\theta = 1 - \cos^2\theta$ to simplify the integrand. Show more…
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