alleryOne radian is the angle subtended at the centre by an arc of length:
AHalf a unit
BOne unit
CTwo units
DPi units
Answer & Solution
Correct answer: B. One unit
1. The definition uses a circle of radius one unit.
2. The arc is taken equal to the radius.
3. So the arc length is one unit.
_Source: syllabus Mathematics, Chapter 3, Trigonometric Functions._
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