Write down sin2x \sin 2x\,sin2x in terms of sinx \sin x\,sinx and cosx\cos xcosx.
Find, for 0<x<π0 < x < \pi0<x<π, all the solutions of the equation
cosec x−8cosx=0. \text{cosec } x - 8 \cos x = 0. cosec x−8cosx=0.giving your answers to 2 decimal places.
Practise Edexcel A Level Old Maths Trigonometry with exam-style questions for A Level Old Maths. 13 questions, matched to the Edexcel A Level Old Maths (9371) specification and written in Unit exams C1, C2, C3 and C4 plus two applied units (e.g. S1 and M1) 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.