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Trigonometric Functions

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Question 19

Solve, for 0≤x≤2π0 \leq x \leq 2\pi0≤x≤2π, the equation,

2cos⁡2x+3cos⁡x−2=0 2\cos^2 x+3\cos x-2=0 2cos2x+3cosx−2=0

Give your answers in terms of π\piπ.

[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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