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3.4 Trigonometry (A-level only)

3.4 Trigonometry (A-level only)

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Question 4

Prove the identity:

cos⁡4Acos⁡2A+sin⁡2A≡cos⁡2A−sin⁡2A \frac{\cos 4A}{\cos 2A + \sin 2A} \equiv \cos 2A - \sin 2A cos2A+sin2Acos4A​≡cos2A−sin2A
[2]
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3.4 Trigonometry (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.4 Trigonometry (A-level only)

221 exam-style questions on CCEA A Level Maths 3.4 Trigonometry (A-level only), covering 3.4.1 Trigonometry (A-level only), 3.4.2 Trigonometry (A-level only), 3.4.3 Trigonometry (A-level only), 3.4.4 Trigonometry (A-level only), 3.4.5 Trigonometry (A-level only), 3.4.6 Trigonometry (A-level only), 3.4.7 Trigonometry (A-level only), and 3.4.8 Trigonometry (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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