Given that sin x + sin y = p and cos x + cos y = q,

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Given that sin x + sin y = p and cos x + cos y = q, find an expression for cos(x − y), in terms of p and q.

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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 07:16 AM

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Given that sin x + sin y = p and cos x + cos y = q,

Question:

Step by Step Answer:

We can use the trigonometric identity cosa b cosacosb sinasinb to find an expression for cosx y Firs...View the full answer

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

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