First slide

Trignometry

Question

A circular arc of length 15 cm has radius 5 cm. The angle subtended by it at centre is :

Moderate

A

$\frac{1}{3} rad$
B

3 rad
C

5 rad
D

$\frac{1}{5} rad$

Solution

$Angle(θ) = \frac{arc}{radius} = \frac{15 cm}{5 cm} = 3 rad$

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