1. Convert Angles in Degrees to Degree and Minutes and vice versa

2. 1° = 60’ 1 degree = 60 minutes

4. Degree and Minutes → Degree 81°12’ = ? °

6. 30°, 45° and 60° Trigonometric Ratios of Special Angles

7. Trigonometric Ratios A B O  opp adj hyp

8. Special Angle: 45° 1 1 45º 1 SOH CAH T0A

9. 60º 1 2 SPECIAL ANGLE: 60° 1 2 30º

10. Special Angle: 0° and 90° Sin 0° = Sin 90° = Cos 0° = Cos 90° = Tan 0° = Tan 90° = 0 1 0 1 0  1

11. Without using calculator, find 5 cos 60° - 2 tan 45° + 3 sin 30 ° = 5(0.5) – 2(1) + 3(0.5) = 2.5 – 2 + 1.5 = 2

12. cos 120° - 2 tan 135° + 3 sin 150 ° = - cos 60° – 2(- tan 45°) + 3(sin 30°) = (- 0.5) – 2(-1) + 3(0.5) = -0.5 + 2 + 1.5 = 3

13. cos 180° - 3 tan 0° + 3 sin 90 ° = – 1 – 3(0) + 3(1) = 2