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Are the following functions identical? ...

Are the following functions identical?
(a) `f(x)=x/x and phi (x)=1`
(b) `f(x)=x and phi (x)=(sqrtx)^(2)`,
(c) `f(x)=1 and phi (x)=sin^(2) x+cos^(2) x`
(d) `f(x)=log (x-1)+log(x-2) and phi(x)=log(x-1) (x-2)`

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Verified by Experts

The correct Answer is:
(a) `No; omega (0)=1` (b) No, `x ge 0` (c) Yes; (d) `x lt 1`
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