Question:
Mark $(\sqrt{)}$ ) against the correct answer in each of the following:
$\int \tan ^{-1}(\sec x+\tan x) d x=?$
A. $\frac{\pi x}{4}+\frac{x^{2}}{4}+C$
B. $\frac{\pi x}{4}-\frac{x^{2}}{4}+C$
C. $\frac{1}{\left(1+x^{2}\right)}+C$
D. none of these
Solution:
