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Find the value of x when tanx=1....

Find the value of x when tanx=1.

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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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