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Radians

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Question 87
a.

For a small angle θ\thetaθ, where θ \theta\,θ is in radians, show that 2cos⁡θ+sin⁡2θ≈22 \cos \theta + \sin^2 \theta \approx 22cosθ+sin2θ≈2

[3]
b.

Hence determine an approximate solution to 2cos⁡θ+sin⁡2θ≈10tan⁡θ2 \cos \theta + \sin^2 \theta \approx 10 \tan \theta2cosθ+sin2θ≈10tanθ

[2]
Markscheme

Radians Questions

  1. A Level
  2. /Maths
  3. /Radians

278 exam-style questions on Edexcel A Level Maths Radians, covering 5.1 Radian Measure, 5.2 Arc Length, 5.3 Areas of Sectors and Segments, 5.4 Solving Trigonometric Equations, and 5.5 Small Angle Approximations. Each one has a worked solution and a mark scheme showing where the marks go.

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