1 radian is approximately equal to:
A90°
B60°
C57.3°
D45°
Answer & Solution
Correct answer: C. 57.3°
1. π rad = 180°.
2. 1 rad = 180°/π ≈ 180/3.14159 ≈ 57.296°.
3. Hence 1 radian ≈ 57.3°.
_Source: NCERT Class 11 Maths Ch 3 "Trigonometric Functions", §3.2 Angles_
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