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