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Core Pure: further calculus

Quick questions on Maclaurin series: the standard expansions, repeated differentiation and approximation - OCR A-Level Further Maths A

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Write the Maclaurin series of cos⁡2x\cos 2x up to the term in x2x^2. [2 marks]
What is q2?
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Use the first two non-zero terms of the series for sin⁡x\sin x to estimate sin⁡0.2\sin 0.2. [2 marks]

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