The curve C C\,C has the equation x=12tany\displaystyle x = \frac{1}{2} \tan yx=21tany
Find dxdy\displaystyle \frac{dx}{dy}dydx in terms of yyy
Hence find dydx\displaystyle \frac{dy}{dx}dxdy in terms of xxx
35 exam-style questions on Edexcel A Level Maths 9.7 Parametric Differentiation. Each one has a worked solution and a mark scheme showing where the marks go.