Use the substitution u=cosxu = \cos xu=cosx to find ∫cos4xsinxdx\int \cos^4 x \sin x dx∫cos4xsinxdx
119 exam-style questions on AQA A Level Maths 1.11.5 Integration by substitution and by parts (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.