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6.1 Angles and Radian Measure

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1 6.1 Angles and Radian Measure
Essential Questions What is a radian? How do you convert between degrees and radians? How do you find arc length? How do you find the area of a sector?

2 Conversion of angle We can convert from degrees to radians using a unit multiplier: On Practice Sheet: 1. Change -250° to radians 7. Change 4π radian to degrees

3 Common Conversions 13. Evaluate tan π/4 14. Evaluate cos 3π/2
Degrees Radians 13. Evaluate tan π/4 14. Evaluate cos 3π/2

4 More practice… 19. Find the length of the arc formed from a central angle of π/6 radians.

5 More practice… 22. Find the area of the sector of a circle with a central angle of π/6 radians and radius 14 units.

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