The distance between the points (acosalp...

The distance between the points `(acosalpha,asinalpha)` and `(acosbeta,asinbeta)` where `a>0`

A

`a cos""(alpha-beta)/2`

B

`2a cos""(alpha-beta)/2`

C

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

D

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

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The correct Answer is:

D

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