Find: ∫0π4cos22θ dθ\displaystyle \int_0^{\frac{\pi}{4}} \cos^2 2\theta \, d\theta∫04πcos22θdθ
31 exam-style questions on Edexcel A Level Maths 11.3 Using Trigonometric Identities. Each one has a worked solution and a mark scheme showing where the marks go.