Problem
The angle \( 70^{\circ} \) is shown on the unit circle together with its coordinates. State another angle that has the same sin value but a different \( \cos \) value.
Solution
Step 1 ：1. \( 70^\circ \) is in Quadrant I, so consider the Quadrant II angle with the same sin value: \( 180^\circ - 70^\circ\)
Step 2 ：2. Calculate the angle: \( 180^\circ - 70^\circ = 110^\circ\)
