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.
221 exam-style questions on CCEA A Level Maths 3.4 Trigonometry (A-level only), covering 3.4.1 Trigonometry (A-level only), 3.4.2 Trigonometry (A-level only), 3.4.3 Trigonometry (A-level only), 3.4.4 Trigonometry (A-level only), 3.4.5 Trigonometry (A-level only), 3.4.6 Trigonometry (A-level only), 3.4.7 Trigonometry (A-level only), and 3.4.8 Trigonometry (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.