1.

If exp [(sin^(2)x+sin^(4)x+sin^(6)x+……………."to"oo)"In"2] is a root of the equation y^(2)-9y+8=0 then the value of (cosx)/(cosx+sinx),0ltxlt(pi)/2 is

Answer»

`SQRT(2)-1`
`(sqrt(2)-1)/2`
`(sqrt(3)-1)/2`
`(sqrt(3),-sqrt(2))/2`

ANSWER :C


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