1.

Three positive acute angles alpha, beta and gamma satisfy the relation tan. (beta)/(2)=(1)/(3)cot.(alpha)/(2)and cot.(gamma)/(2)=(1)/(2)(3tan.(alpha)/(2)+cot.(alpha)/(2)). Then, the value of alpha+beta+gamma is equal to

Answer»

`PI`
`2PI`
`(pi)/(2)`
`(3PI)/(2)`

ANSWER :A


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