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Consider f, g and h be three real valued...

Consider f, g and h be three real valued function defined on R.
Let `f(x)= sin 3x + cos x , g(x)= cos 3x + sin x ` and ` h(x) = f^(2)(x) + g^(2)(x) `
Q. General solution of the equation ` h(x) = 4 ` , is :
[where ` n in I ` ]

A

`(4n+1)pi//8`

B

`(8n+1)pi//8`

C

`(2n+1)pi//4`

D

`(7n+1)pi//4`

Text Solution

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The correct Answer is:
A
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