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Trigonometry and Modelling

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Question 2
61%

Prove the identity:

cos⁡2θcos⁡θ−sin⁡θ≡cos⁡θ+sin⁡θ \frac{\cos 2\theta}{\cos \theta - \sin \theta} \equiv \cos \theta + \sin \theta cosθ−sinθcos2θ​≡cosθ+sinθ
[2]
Markscheme

Trigonometry and Modelling Questions

  1. A Level
  2. /Maths
  3. /Trigonometry and Modelling

348 exam-style questions on Edexcel A Level Maths Trigonometry and Modelling, 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. Each one has a worked solution and a mark scheme showing where the marks go.

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