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Question 76

Given that θ \theta\,θ is small and is measured in radians, use the small angle approximations to show that

4θsin⁡3θ1−cos⁡2θ≈6 \frac{4\theta \sin 3\theta}{1 - \cos 2\theta} \approx 6 1−cos2θ4θsin3θ​≈6

Show that the expression is approximately equal to 6.

[3]
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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