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Radians

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Question 42
a.

When x x\,x is small, show that tan⁡(3x)cos⁡(4x)\tan(3x) \cos(4x)tan(3x)cos(4x) can be approximated by 3x−15x33x - 15x^33x−15x3

[3]
b.

Hence, approximate the value of tan⁡(0.3)cos⁡(0.4)\tan(0.3) \cos(0.4)tan(0.3)cos(0.4)

[2]
c.

Calculate the percentage error in your approximation

[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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