Given that
y=x4cosx y = \frac{x^4}{\cos x} y=cosxx4find dydx\frac{\text{d}y}{\text{d}x}dxdy.
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.