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Trigonometric Functions

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Question 36

Prove that:

sec⁡4x−tan⁡4x≡2sec⁡2x−1 \sec^4x - \tan^4x \equiv 2\sec^2x - 1 sec4x−tan4x≡2sec2x−1
[3]
Markscheme

Trigonometric Functions Questions

  1. A Level
  2. /Maths
  3. /Trigonometric Functions

274 exam-style questions on Edexcel A Level Maths Trigonometric Functions, covering 6.1 Secant, Cosecant and Cotangent, 6.2 Graphs of Sec x, Cosec x and Cot x, 6.3 Using Sec x, Cosec x and Cot x, 6.4 Trigonometric Identities, and 6.5 Inverse Trigonometric Functions. Each one has a worked solution and a mark scheme showing where the marks go.

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