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Find the range of `tan^(-1)((2x)/(1+x^2))`A. `[-(pi)/(4), (pi)/(4)]`B. `(-(pi)/(2), (pi)/(2))`C. `(-(pi)/(2), (pi)/(4)]`D. `[(pi)/(4), (pi)/(2)]` |
Answer» Correct Answer - A `1 + x^(2) ge 2 |x|` or `(2|x|)/(1 + x^(2)) le 1` or `-1 le (2x)/(1 + x^(2)) le 1` `rArr tan^(-1) ((2x)/(1 + x^(2))) in [-(pi)/(4), (pi)/(4)]` |
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