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Trigonometric Functions

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Question 37

Verify, for −180≤x≤180-180 \leq x \leq 180−180≤x≤180, that the equation,

2cot⁡2x−cosec⁡2x+cosec⁡x=4 2 \cot^2x - \operatorname{cosec}^2x + \operatorname{cosec}x = 4 2cot2x−cosec2x+cosecx=4

has the solutions, to 1 decimal place,

x=−19.5∘, −160.5∘, 30∘, 150∘. x=-19.5^\circ,\ -160.5^\circ,\ 30^\circ,\ 150^\circ. x=−19.5∘, −160.5∘, 30∘, 150∘.
[5]
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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