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Trigonometry and Modelling

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Question 54

Prove the identity:

−6sin⁡x6cos⁡x−3sec⁡x≡tan⁡(−2x) \frac{-6 \sin x}{6 \cos x - 3\sec x} \equiv \tan(-2x) 6cosx−3secx−6sinx​≡tan(−2x)
[4]
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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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