Engineering Board Exam Reviewer · Trigonometric Identities · medium
CE Board November 1993: If 65° + 55° = , find in radians.
- 0.765
- 0.087
- 1.213
- 1.421
Answer
B. 0.087
Solution
65°+ 55° = 2 ≤ft(65°+55°/2 ) ≤ft(65°-55°/2 ) = 2 60° 5° 0.9962. So = (0.9962)=5° 0.087 rad.
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