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Let f:X rarr Y be a function defined by ...

Let `f:X rarr Y` be a function defined by
`f(x)=2sin(x+pi/4)-sqrt(2)cosx+c.`
`bb"Statement I"` For set `X,x in [0,pi/2] cup [pi,(3pi)/2]`, f(x) is one-one function.
`bb"Statement II" f'(x) ge 0,x in [0,(3pi)/2]`

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