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3.5 Trigonometry (A-level only)

3.5 Trigonometry (A-level only)

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Question 117
a.

When x x\,x is small and measured in radians, show that tan⁡3xcos⁡2x \tan 3x \cos 2x\,tan3xcos2x can be approximated by 3x−6x33x - 6x^33x−6x3.

[3]
b.

Hence find an approximate value for tan⁡0.3cos⁡0.2\tan 0.3 \cos 0.2tan0.3cos0.2.

[2]
c.

Calculate the percentage error in your approximation, giving your answer to two significant figures.

[1]
Markscheme

3.5 Trigonometry (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.5 Trigonometry (A-level only)

225 exam-style questions on WJEC A Level Maths 3.5 Trigonometry (A-level only), covering 3.5.1 Trigonometry (A-level only), 3.5.2 Trigonometry (A-level only), 3.5.3 Trigonometry (A-level only), 3.5.4 Trigonometry (A-level only), 3.5.5 Trigonometry (A-level only), 3.5.6 Trigonometry (A-level only), 3.5.7 Trigonometry (A-level only), and 3.5.8 Trigonometry (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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