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If `cos^(-1)((1-x^(2))/(1+x^(2)))+sin^(-1)((2x)/(1+x^(2)))=p` for all `x in[-1,0]`, then p is equal toA. `(-pi)/(2)`B. 0C. `(pi)/(2)`D. `(2pi)/(3)` |
Answer» Correct Answer - B For `x in [-1,0],cos^(-1)((1-x^(2))/(1+x^(2)))=-2 tan^(-1)x` and `sin^(-1)((2x)/(1+x^(2)))=2 tan^(-1)x` `therefore p=0 AA x in [-1,0]` |
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