Given that cos x = 4/5 and that 0 < x < 90, without using a calculator

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Given that cos x = 4/5 and that 0°< x < 90°, without using a calculator find the exact value of cos(x − 60°).

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Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook

ISBN: 9781108407199

1st Edition

Authors: Sue Pemberton, Julianne Hughes, Julian Gilbey

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Question Posted: Mar 14, 2023 07:17 AM

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Given that cos x = 4/5 and that 0 < x < 90, without using a calculator

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To find the exact value of cosx 60 we can use the trigo...View the full answer

Cambridge International AS & A Level Mathematics Pure Mathematics 2 & 3 Coursebook

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