1.

Let f: X rarrY , f(x)= sin x + cos x + 2 sqrt(2) beinvertible. Thenwhich X rarr Y is not possible ?

Answer»

`[ PI/4, (5 pi)/(4)] RARR [ SQRT(2), 3 sqrt(2)]`
`[ - (3PI)/(4), pi/4] rarr [ sqrt(2), 3 sqrt(2)]`
`[ - (3pi)/(4), (3 pi)/(4) ] rarr [ sqrt(2), 3 sqrt(2)]`
none of these

Answer :B


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