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Radians

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Question 64
a.

When x x\,x is small, show that tan⁡(4x)cos⁡(2x)\tan(4x) \cos(2x)tan(4x)cos(2x) can be approximated by 4x−8x34x - 8x^34x−8x3

[3]
b.

Hence, approximate the value of tan⁡(0.4)cos⁡(0.2)\tan(0.4) \cos(0.2)tan(0.4)cos(0.2)

[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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