alleryIn a circle of radius r, an arc of length r subtends an angle of:
AOne radian
BTwo radians
CPi radians
DOne degree
Answer & Solution
Correct answer: A. One radian
1. The radian definition scales with the circle.
2. An arc equal to the radius always gives the same angle.
3. That angle is one radian.
_Source: syllabus Mathematics, Chapter 3, Trigonometric Functions._
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