Question
Asked Sep 17, 2019
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sin2xsin5xcos2xcos5x. Complete identity

 

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Expert Answer

Step 1

Consider the identity

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sin 2x sin 5x cos 2x cos 5x

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Step 2

Now solve this identity

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(sin 2x cos 5x) (cos 2xsin 5x

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Step 3

Using the fo...

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2sin a cos a sin 2a

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Calculus

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