Since $315^\circ = 360^\circ - 45^\circ$, we use the reference angle and the sine quadrant rule:

February 22, 2026

$Since $315^\circ = 360^\circ - 45^\circ$, we use the reference angle and the sine quadrant rule:$

Since \(315^\circ = 360^\circ - 45^\circ\), we use the reference angle and the sine quadrant rule: