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3.5 Trigonometry (A-level only)

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Question 23

Solve, for −180≤θ≤180-180 \leq \theta \leq 180−180≤θ≤180, the equation,

2tan⁡2θ−sec⁡2θ+sec⁡θ=4 2\tan^2\theta - \sec^2\theta + \sec\theta = 4 2tan2θ−sec2θ+secθ=4

Give your answers to 1 decimal place where appropriate.

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3.5 Trigonometry (A-level only) Questions

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