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Section 6-1

Section 6-1. Angles and Radian Measure. Degree/Radian Conversion Formulas. Change 115° to radian measure in terms of π 23 π /36 Change radians to degree measure. -157.5°. Evaluate Cos 4 π /3. Evaluate tan 5 π /4.

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Section 6-1

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  1. Section 6-1 Angles and Radian Measure

  2. Degree/Radian Conversion Formulas

  3. Change 115° to radian measure in terms of π 23π/36 Change radians to degree measure. -157.5°

  4. Evaluate Cos 4π/3

  5. Evaluate tan 5π/4

  6. The length of any circular arc s is equal to the product of the measure of the radius of the circle r and the radian measure of the central angle θ that it subtends. s= rθ Circular Arc Central angle s θ

  7. Given a central angle of 125°, find the length of its intercepted arc in a circle of radius 7 centimeters. Round to the nearest tenth. 125°= 125° x π/180° = 25 π/36 or 2.18 s=2.18 x 7= 15.3

  8. Page 348 5-12

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