Solve, for −π<x<π-\pi < x < \pi−π<x<π, the equation 4cos(2x−0.3)+1=04\cos(2x - 0.3) + 1 = 04cos(2x−0.3)+1=0 giving your answers, in radians, to 2 decimal places.
Solve, for 0∘<θ<360∘0^\circ < \theta < 360^\circ0∘<θ<360∘, the equation 3tanθsinθ=8−cosθ3\tan \theta \sin \theta = 8 - \cos \theta3tanθsinθ=8−cosθ 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.