Skip to content

Course home

Trigonometry and Modelling

Trigonometry and Modelling

EasyMediumHard
123456789
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]
Markscheme

Trigonometry and Modelling Questions

  1. A Level
  2. /Maths
  3. /Trigonometry and Modelling

137 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.

Question bank