Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
EasyFind the angle in radians through which a pendulum swings if its length is $75 \, cm$ and the tip describes an arc of length $21 \, cm$.
- A$7/25 \, \text{radians}$
- B$25/7 \, \text{radians}$
- C$1/3 \, \text{radians}$
- D$3/10 \, \text{radians}$
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