Problem
If \( x=10, y=5 \), and \( z=11 \), what is the cosine ratio for \( g^{\circ} \) ?
Solution
Step 1 ：\[ \cos g^{\circ} = \frac{x}{z} \]
Step 2 ：\[ \cos g^{\circ} = \frac{10}{11} \]
Step 3 ：\[ g^{\circ} = \arccos{\frac{10}{11}} \]
