2000005405

All values of the function $f(x)=2-\cos x$ are positive.

Function $f(x)=\mathrm{tg}x$ is increasing over the whole domain.

The smallest positive period of the function $f(x)=\sin 4x$ is $\frac{\pi }{4}$.

Function $f(x)=1+\sin x$ is an odd function.