1.

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

Answer»

`2/(SIN2THETA)-1/theta`
`2/(sin2theta)+1/theta`
`1/(sin2theta)-1/theta`
`1/(SINTHETA)-1/theta`

ANSWER :A


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