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find the value of the cosx=1...

find the value of the `cosx=1`

A

`pmsqrt(npi),n in{0, 1, 2, ...}`

B

`pmsqrt(npi),n in{1, 2, 3, ...}`

C

`(pi)/(2)+2npi,n in{..., -2, -1, 0, 1, 2, ...}`

D

`2npi,n in{..., -2, -1, 0, 1, 2, ...}`

Text Solution

Verified by Experts

The correct Answer is:
A
`because(fogogof)(x)=(gogof)(x)`
`therefore (sinsinx^(2))^(2)=sinsinx^(2)impliessinsinx^(2)=0or1`
`impliesx=+sqrt(npi),nin{0,1,2,3,...}`
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