Express the following as a product :
$sin 7 x - sin 3 x$

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Express the following as a product :

sin 7 x - sin 3 x

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Text solutionVerified

Using formula,

sin C - sin D = 2 cos \frac{C + D}{2} sin \frac{C - D}{2}

sin 7 x - sin 3 x

= 2 cos (\frac{7 x + 3 x}{2}) sin (\frac{7 x - 3 x}{2})

= 2 cos 5 x sin 2 x

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Question Text	Express the following as a product : $sin 7 x - sin 3 x$
Answer Type	Text solution:1
Upvotes	150