1.

The value of `lim_(|x| rarr oo) cos (tan^(-1) (sin (tan^(-1) x)))` is equal toA. `-1`B. `sqrt2`C. `-(1)/(sqrt2)`D. `(1)/(sqrt2)`

Answer» Correct Answer - D
`underset(|x| rarr oo)("lim") cos (tan^(-1) (sin (tan^(-1) x)))`
`= cos (tan^(-1) (sin (tan^(-1) oo)))`
`= cos (tan^(-1) (sin ((pi)/(2))))`
`= cos (tan^(-1) (1)) = cos ((pi)/(4))`
`= (1)/(sqrt2)`


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