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3.5 Trigonometry (A-level only)

3.5 Trigonometry (A-level only)

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Question 19

Prove the identity

cos⁡2xcos⁡x+sin⁡x≡cos⁡x−sin⁡x\displaystyle \frac{\cos 2x}{\cos x + \sin x} \equiv \cos x - \sin xcosx+sinxcos2x​≡cosx−sinx

[2]
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3.5 Trigonometry (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.5 Trigonometry (A-level only)

225 exam-style questions on WJEC A Level Maths 3.5 Trigonometry (A-level only), covering 3.5.1 Trigonometry (A-level only), 3.5.2 Trigonometry (A-level only), 3.5.3 Trigonometry (A-level only), 3.5.4 Trigonometry (A-level only), 3.5.5 Trigonometry (A-level only), 3.5.6 Trigonometry (A-level only), 3.5.7 Trigonometry (A-level only), and 3.5.8 Trigonometry (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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