The first term of an arithmetic progression is cos 2 x and the second term is 1.

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The first term of an arithmetic progression is cos² x and the second term is 1.

a. Write down an expression, in terms of cos x, for the seventh term of this progression.

b. Show that the sum of the first twenty terms of this progression is 20 + 170 sin² x.

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Cambridge IGCSE And O Level Additional Mathematics Coursebook

ISBN: 9781108411660

2nd Edition

Authors: Sue Pemberton

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Question Posted: Aug 31, 2021 01:04 AM

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The first term of an arithmetic progression is cos 2 x and the second term is 1.

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a The common difference of an arithmetic progression is the difference between ...View the full answer

Cambridge IGCSE And O Level Additional Mathematics Coursebook

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