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Trigonometric Identities and Equations

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Question 11

The diagram shows parts of the curves y=8cos⁡2θy = 8\cos^2\thetay=8cos2θ and y=7−2tan⁡θcos⁡θy = 7 - 2\tan\theta \cos\thetay=7−2tanθcosθ, where θ \theta\,θ is in degrees.

A graph on theta-y axes shows parts of the curves y = 8cos²θ and y = 7 − 2tanθ cosθ, with θ in degrees.

Solve the inequality 7−2tan⁡θcos⁡θ>8cos⁡2θ7 - 2\tan\theta \cos\theta > 8\cos^2\theta7−2tanθcosθ>8cos2θ for 0∘≤θ<360∘0^\circ \leq \theta < 360^\circ0∘≤θ<360∘

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Markscheme

Trigonometric Identities and Equations Questions

  1. A Level
  2. /Maths
  3. /Trigonometric Identities and Equations

322 exam-style questions on Edexcel A Level Maths Trigonometric Identities and Equations, covering 10.1 Angles in all four Quadrants, 10.2 Exact Values of Trigonometric Ratios, 10.3 Trigonometric Identities, 10.4 Solving Trigonometric Equations, 10.5 Harder Trigonometric Equations, and 10.6 Equations and Identities. Each one has a worked solution and a mark scheme showing where the marks go.

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