Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
$\int \sin ^{-1}\left(\frac{2 x}{1+x^{2}}\right) d x=?$
A. $2 x \tan ^{-1} x+\log \left|1+x^{2}\right|+C$
B. $2 x \tan ^{-1} x-\log \left|1+x^{2}\right|+C$
C. $2 x \sin ^{-1} x+\log \left|1+x^{2}\right|+C$
D. none of these
Solution:
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