Exponentiate a Pauli generator

Let $X=\begin{pmatrix}0&1\\1&0\end{pmatrix}$ and $\theta=\pi/3$. Enter the $2\times2$ complex matrix of $e^{-i\theta X/2}$ in the computational basis, with rows and columns ordered $\lvert0\rangle,\lvert1\rangle$. The check is phase-sensitive: a global phase $e^{i\gamma}U$ with $\gamma\neq0$ is a different matrix and is marked wrong. Entries are accepted within $10^{-3}$.