Solution
= Solution
In the <Euler angles for a symmetric top> convention, $\theta$ is the inclination of the body symmetry axis $\mathbf e_3$ from the fixed vertical, $\phi$ is the azimuth of the line of nodes in the fixed horizontal plane, and $\psi$ is rotation about $\mathbf e_3$ measured from that line:
\Image[/past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2020/ii/paper-2-symmetric-top-euler-angles.png]
{title=<Euler angles> for a <symmetric top>}