Without using a calculator, show that cos 60cos 45 = cos 30

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Without using a calculator, show that cos² 60°cos² 45° = cos² 30°

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Cambridge IGCSE And O Level Additional Mathematics

ISBN: 9781510421646

1st Edition

Authors: Val Hanrahan, Jeanette Powell

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Question Posted: Sep 03, 2021 01:54 AM

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Without using a calculator, show that cos 60cos 45 = cos 30

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The identity cos 1 sin can be used to show that cos 60cos 45 cos 30 Starting w...View the full answer

Cambridge IGCSE And O Level Additional Mathematics

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