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If sin 2x = 4 cos x , then x =...

If `sin 2x = 4 cos x` , then x =

A

`2 npi pm (pi)/(2) , n in Z `

B

`n""(pi)/(2) pm (pi)/(4) , n in Z`

C

no value

D

`npi + (-1)^(n) (pi)/(4) , n in Z`

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A
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