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If the distance between the points (a co...

If the distance between the points `(a cos theta, a sin theta ) ` and `(a cos phi, a sin phi)` is 2a, `theta=`

A

` 2n pi pm pi + phi, n in Z `

B

`n pi + (pi)/(2) + phi, n in Z `

C

` n pi - phi, n in Z `

D

` 2n pi + phi, n in Z `

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The correct Answer is:
A
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