1.

The value of sum_(n=1)^(oo) (tan((theta)/(2^(n))))/(2^(n-1)"cos"(theta)/(2^(n-1))) is

Answer»

`(2)/(SIN 2 THETA)-(1)/(theta)`
`(2)/(sin 2 theta) + (1)/(theta)`
`(1)/(sin 2 theta)-(1)/(theta)`
`(1)/(sin theta) - (1)/(theta)`

ANSWER :A


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