7.5 Proving Trigonometric Identities
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a.

For sin⁡θ≠0\sin \theta \neq 0sinθ=0, prove that

cosec 2θ−cot⁡2θ=tan⁡θ\text{cosec } 2\theta - \cot 2\theta = \tan \thetacosec 2θ−cot2θ=tanθ

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b.

Explain why the identity cosec 2θ−cot⁡2θ=tan⁡θ\text{cosec } 2\theta - \cot 2\theta = \tan \thetacosec 2θ−cot2θ=tanθ is not valid when sin⁡θ=0\sin \theta = 0sinθ=0.

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7.5 Proving Trigonometric Identities Questions

Practise Edexcel A Level Maths 7.5 Proving Trigonometric Identities with exam-style questions for A Level Maths. 27 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.

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7.5 Proving Trigonometric Identities Questions

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