Which one of the following gives the correct relation among arc length

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Which one of the following gives the correct relation among arc length ss, radius rr and angular displacement θ\theta (in radians) of a circle? (a) s=rθs = \dfrac{r}{\theta} (b) s=r θ2s = \dfrac{r\,\theta}{2} (c) s=r θs = r\,\theta (d) s=2πr θs = 2\pi r\,\theta

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