MCQOPTIONS
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MCQOPTIONS
| 1. |
The equation \({\tan ^{ - 1}}\left( {1 + {\rm{x}}} \right) + {\tan ^{ - 1}}\left( {1 - {\rm{x}}} \right) = \frac{{\rm{\pi }}}{2}\) is satisfied by |
| A. | x = 1 |
| B. | x = -1 |
| C. | x = 0 |
| D. | x = ½ |
| Answer» D. x = ½ | |