5.5 Small Angle Approximations
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a.

When θ \theta\,θ is small, show that cos⁡θ2sin⁡θ\displaystyle \frac{\cos \theta}{2\sin \theta}2sinθcosθ​ can be approximated by 2−θ24θ\displaystyle \frac{2 - \theta^2}{4\theta}4θ2−θ2​

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b.

Hence, approximate the value of cos⁡π302sin⁡π30\displaystyle \frac{\cos \frac{\pi}{30}}{2\sin \frac{\pi}{30}}2sin30π​cos30π​​

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c.

Calculate the percentage error in your approximation

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5.5 Small Angle Approximations Questions

Practise Edexcel A Level Maths 5.5 Small Angle Approximations with exam-style questions for A Level Maths. 25 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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5.5 Small Angle Approximations Questions

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