Find the range of each function . For any function that is not one to one , give two distinct values of x which have the same image .

(1) $\displaystyle f(x)=sin x$ , x are real numbers

(2) $\displaystyle g(x)=\sqrt{x}+\sqrt{1+x}$ , $\displaystyle o\geq x \geq1$ ,

(3) $\displaystyle h(x)=In{x}$ , $\displaystyle x>0$

the range for sine function is [-1,1]

but for the rest , i am not really sure .