If secA = 13/5 and A is acute, find sinA
2025
If secA = 13/5 and A is acute, find sinA
- A.
5/13
- B.
12/13
- C.
13/12
- D.
13/5
Show answer & explanation
Correct answer: B
If sec A = 13/5, then cos A = 5/13. Since A is acute, sin A = sqrt(1 - 25/169) = 12/13.