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`sin^(-1)((1-x^(2))/(1+x^(2)))`का मान है ?A. `2 tan ^(-1) x`B. ` pi + tan^(-1) x`C. ` pi/2 - 2 tan ^(-1) x`D. इनमे से कोई नहीं |
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Answer» Correct Answer - C माना `x = tan theta` ` :. sin^(-1)((1-x^(2))/(1+x^(2))) = sin^(-1)((1-tan^(2)theta)/(1+tan^(2) theta))` ` = sin^(-1) (cos 2theta) = sin^(-1)[sin(pi/2 - 2 theta)]` ` = pi/2 - 2 theta = pi/2 - 2 tan^(-1) x` |
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