Question 42
Trigonometry4 sin2x − 3 = 0, find x if 0 ≤ x ≤ 90°
- A.30°
- B.45°
- C.60°
- D.90°
Show the answer and explanation
Answer: C (60°)
Explanation
sin²x = 3/4, so sin x = √3/2 (positive in this range). Then x = 60°.
4 sin2x − 3 = 0, find x if 0 ≤ x ≤ 90°
Answer: C (60°)
sin²x = 3/4, so sin x = √3/2 (positive in this range). Then x = 60°.