Solve, for −180≤θ≤180-180 \leq \theta \leq 180−180≤θ≤180, the equation,
2tan2θ−sec2θ+secθ=4 2\tan^2\theta - \sec^2\theta + \sec\theta = 4 2tan2θ−sec2θ+secθ=4Give your answers to 1 decimal place where appropriate.
Practise Edexcel A Level Maths 6.3 Using Sec x, Cosec x and Cot x with exam-style questions for A Level Maths. 16 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.