Prove each of these identities. a. b. c. d. cos x - sin? x = cos x
Question:
Prove each of these identities.
a.
b.
c.
d.
Transcribed Image Text:
cos x - sin? x = cos x + sin x Cos x - sinx
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ANSWER a cos x sin x cosx sinx cos x sin x To prove this identity we can start by using the identity cos x sin x 1 to write cos x sin x cos x sin x 2 sin x 1 2 sin x Then we can rewrite the denominato...View the full answer
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Related Book For
Cambridge IGCSE And O Level Additional Mathematics Coursebook
ISBN: 9781108411660
2nd Edition
Authors: Sue Pemberton
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