## Trigonometry (10th Edition)

$45^{\circ}12'9''$
1.Use the conversion: $1'=\frac{1}{60}^{\circ}$ $1''=\frac{1}{3600}^{\circ}$ 2. $45.2025 = 45^{\circ}+0.2025(60')$ $=45^{\circ}+12.15'$ $=45^{\circ}+12'+0.15 (60'') =45^{\circ}12'9''$