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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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