A clockwise rotation in radians

The terminal arm of an angle turns clockwise through \(13\pi/6\) radians from the positive \(x\)-axis. Let its signed angle be \(\theta\).

1. Express \(\theta\) in degrees.[1]
2. Find the angle \(\phi\) in \(0^\circ\le\phi<360^\circ\) with the same terminal arm, and state its basic angle.[2]
3. Find the exact values of \(\sin\theta\) and \(\cos\theta\).[2]