Differentiate with respect to xxx,
x2cos2xx^2 \cos 2xx2cos2x
3sin(2x+1)3 \sin(2x + 1)3sin(2x+1)
133 exam-style questions on WJEC A Level Maths 3.6.5 Differentiation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.