The point P P\,P lies on the curve with equation y=sec(x2)\displaystyle y = \sec \left( \frac{x}{2} \right)y=sec(2x) with x x\,x coordinate 2π3\displaystyle \frac{2\pi}{3}32π.
Find an equation of the normal to the curve at the point PPP.
Practise Edexcel A Level Maths 9.3 The Chain Rule with exam-style questions for A Level Maths. 50 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.