## Trigonometry (10th Edition)

53$^{\circ}$41'13"
1. Redistribute one degree from the 90 degrees to 60 minutes. Then change one of 60 minutes to 60 seconds. $89^{\circ}59'60" - 36^{\circ}18'47" = ?$ 2. Subtract separately then combine $89^{\circ}-36^{\circ}=53^{\circ}$ $59'- 18' =41'$ $60"-47"=13"$ Answer: $53^{\circ}41'13"$