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chapter 8 - Chapter 8 Exercises 8.1 1 30 = 30 radians =...

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253 Chapter 8 Exercises 8.1 1. 30 ° = 30 π 180 radians = π 6 radians 120 ° = 120 π 180 radians = 2 π 3 radians 315 ° = 315 π 180 radians = 7 π 4 radians 2. 18 ° = 18 π 180 radians = π 10 radians 72 ° = 72 π 180 radians = 2 π 5 radians 150 ° = 150 π 180 radians = 5 π 6 radians 3. 450 ° = 450 π 180 radians = 5 π 2 radians 210 ° = − 210 π 180 radians = − 7 π 6 radians 90 ° = − 90 π 180 radians = − π 2 radians 4. 990 ° = 990 π 180 radians = 11 π 2 radians 270 ° = − 270 π 180 radians = − 3 π 2 radians 540 ° = − 540 π 180 radians = − 3 π radians 5. t = 8 π 2 = 4 π radians 6. t = − 3 π 2 = − 3 π 2 radians 7. t = 7 π 2 = 7 π 2 radians 8. t = 9 π 2 = 9 π 2 radians 9. t = − 6 π 2 = − 3 π radians 10. t = − 5 π 2 = − 5 π 2 radians 11. t = 2 π 3 = 2 π 3 radians 12. t = 5 π 4 = 5 π 4 radians 13. 3 π 2 3 π 4 5 π 14. x y π 3 x y 5 π 2 x y 6 π
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