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If sin A+sin 2A+sin3A=cos A+cos 2A+cos 3...

If `sin A+sin 2A+sin3A=cos A+cos 2A+cos 3A,` then `tan 2A` is equal to

A

1

B

`-1`

C

`1/2`

D

`-1/2`

Text Solution

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The correct Answer is:
A
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