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Trigonometry and Modelling

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Question 24

Prove the identity:

ksin⁡xkcos⁡x−sec⁡x≡ksin⁡2xkcos⁡2x+k−2 \frac{k \sin x}{k \cos x - \sec x} \equiv \frac{k \sin 2x}{k \cos 2x + k - 2} kcosx−secxksinx​≡kcos2x+k−2ksin2x​
[4]
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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