Solve, for 0<θ<π0 < \theta < \pi0<θ<π 3secθ=8sinθ3 \sec \theta = 8 \sin \theta3secθ=8sinθ giving your answers, in radians, to 3 significant figures.
Solve, for 0<x<180∘0 < x < 180^\circ0<x<180∘ tan3x−tan22∘1+tan3xtan22∘=0.8\frac{\tan 3x - \tan 22^\circ}{1 + \tan 3x \tan 22^\circ} = 0.81+tan3xtan22∘tan3x−tan22∘=0.8 giving your answers, in degrees, to one decimal place.
Practise Edexcel A Level Maths Trigonometry and Modelling with exam-style questions for A Level Maths. 100 questions covering 7.1 Addition Formulae, 7.2 Double Angle Formulae, 7.3 Solving Trigonometric Equations, 7.4 Simplifying a cos x +- b sin x, 7.5 Proving Trigonometric Identities, and 7.6 Modelling with Trigonometric Functions, 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.