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If alpha ,beta, gamma are the parameters...

If `alpha ,beta, gamma` are the parameters of points A,B,C on the circle `x^2+y^2=a^2` and if the triangle ABC is equilateral ,then

A

`Sigma cos alpha=0`

B

`Sigma sin alpha=0`

C

`Sigma tan alpha=0`

D

`Sigma cot alpha=0`

Text Solution

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The correct Answer is:
A, B
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