1.

If the equality int_(0)^(x) (bt cos 4t)/( t^2) dt = (a sin 4x)/( x) -1 holds for all x such that 0 lt x lt pi //4 then a and b are given by

Answer»

`a=1//4, b=1`
`a=2,b=2`
`a=-1, b=4`
`a=2, b=4`

ANSWER :A


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