If ℝ be the set of real numbers, which of the following is one-one?

\(f:\mathbb{R}\rightarrow \mathbb{R}, f(x)=\sin x\)

\(g:\mathbb{R}\rightarrow \mathbb{R}, g(x)=\cos x\)

\(h:\mathbb{R}\rightarrow \mathbb{R}, h(x)=e^{x}\)

None of these