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Question

What is the value of sin4x=?


A

sin2xcos2x

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B

-2sin2xcos2x

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C

2 sin2xcos2x

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D

–sin2xcos2x

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Solution

The correct option is C

2 sin2xcos2x


We know that sin 2A= 2sinA cosA

So, substituting, A= 2x

We get,

sin4x = 2sin2xcos2x


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