SSC CHSL 2025 · PYQ · Trigonometry · medium
In a right triangle ABC, right-angled at B, if tan A = 1/√3, what is the value of 2 sin A cos A?
Answer
The correct answer is D: √3/2. tan A = 1/√3 means A = 30°. sin 30° = 1/2, cos 30° = √3/2.
- A.√3/8
- B.√3/5
- C.√3/7
- D.√3/2✓ Correct
tan A = 1/√3 means A = 30°. sin 30° = 1/2, cos 30° = √3/2. 2 sin A cos A = sin 2A = sin 60° = √3/2.
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