Express cos2(4u)\cos^2(4u)cos2(4u) in terms of cos(8u)\cos(8u)cos(8u).
Find: ∫cos2(4u) du\int \cos^2(4u) \, du∫cos2(4u)du.
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.