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    				| 1. | 
                                    If ` 2 tan ^(-1) x = sin ^(-1) k` then the value of k is -A. ` (1-x^(2))/(1+x^(2))`B. `(2x)/(1-x^(2))`C. `(2x)/(1+x^(2))`D. `(2x^(2))/(1+x^(2))` | 
                            
| Answer» Correct Answer - C | |