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