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A particle moves through angular displac...

A particle moves through angular displacement `theta` on a circular path of radius' r'. The linear displacement will be:

A

`2r sin ((theta)/(2))`

B

`2r cos ((theta)/(2))`

C

` 2r tan ((theta)/(2))`

D

`2r cot ((theta)/(2))`

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The correct Answer is:
A
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