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3.4 Trigonometry (A-level only)

3.4 Trigonometry (A-level only)

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Question 25
a.

When θ \theta\,θ is small, show that cos⁡θ3sin⁡θ\displaystyle \frac{\cos \theta}{3\sin \theta}3sinθcosθ​ can be approximated by 2−θ26θ\displaystyle \frac{2 - \theta^2}{6\theta}6θ2−θ2​

[3]
b.

Hence, approximate the value of cos⁡0.13sin⁡0.1\displaystyle \frac{\cos 0.1}{3\sin 0.1}3sin0.1cos0.1​

[2]
c.

Calculate the percentage error in your approximation

[2]
Markscheme

3.4 Trigonometry (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.4 Trigonometry (A-level only)

221 exam-style questions on CCEA A Level Maths 3.4 Trigonometry (A-level only), covering 3.4.1 Trigonometry (A-level only), 3.4.2 Trigonometry (A-level only), 3.4.3 Trigonometry (A-level only), 3.4.4 Trigonometry (A-level only), 3.4.5 Trigonometry (A-level only), 3.4.6 Trigonometry (A-level only), 3.4.7 Trigonometry (A-level only), and 3.4.8 Trigonometry (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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