\( \sin \left[2 \tan ^{-1} \sqrt{\frac{1-x}{1+x}}\right] \) को सरलतम रूप में व्यक्त कीजिए।
\( \sin \left[2 \tan ^{-1} \sqrt{\frac{1-x}{1+x}}\right] \) को सरलतम रूप में व्यक्त कीजिए।
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