Skip to content
MathsGenie logo
Open app

Course home

  1. A Level
  3. Maths CCEA
  5. Question bank

Trigonometry and Modelling

EasyMediumHard
12345678
Question 5

Prove the identity:

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

Trigonometry and Modelling Questions

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