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Find the exact value for $\int_{\frac{5\pi}{12}}^{\frac{\pi}{4}} 3\cos^2 5x\,dx$.
Mathematics 9709 · AS & A Level · Integration
Integration — practice question
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply a correct double-angle identity, for example $\sin^2x=\frac12(1-\cos2x)$ or $\cos^2x=\frac12(1+\cos2x)$” …
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