Engineering Board Exam Reviewer · Angles and Trigonometric Functions · easy
An arc of a circle of radius 12 cm subtends a central angle of 75°. Find the arc length in cm.
- 5 π/2 7.85
- 10 π 31.42
- 12 π/5 7.54
- 5 π 15.71
Answer
D. 5 π 15.71
Solution
s=r =12≤ft(75°·π/180° )=12·5π/12=5π 15.71 cm.
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