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समीकरण 2 cos ^(2)x =1 का व्यापक हल होगा...

समीकरण `2 cos ^(2)x =1` का व्यापक हल होगा

A

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

B

`(npi)/(2) pm (pi)/(4), n in Z1`

C

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

D

`(npi)/(2) pm (pi)/(4) , n in Z1`

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