Answer
$360^o\;\;\;\;\;\;\;\;,\;\;\;\;\;\;\;\;2\pi$
Work Step by Step
We add $\;\;\;{\color{red}{360^o} }\;\;\;$ to the values of $\theta$ to find all coterminal solutions. If solving in radians, we add $\;\;\;\;{\color{red} {2\pi} }\;\;\;\;$ to the values of $\theta$ to find all coterminal solutions.