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The distance between the points (a cosal...

The distance between the points `(a cosalpha, a sinalpha)` and `(a cosbeta, a sinbeta)` where a> 0

A

`2|asin ""(alpha-beta)/(2)|`

B

`|a sin ""(alpha-beta)/(2)|`

C

`2|a sin ""(alpha+beta)/(2)|`

D

`|asin""(alphs+beta)/(2)|`

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The correct Answer is:
A
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