Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
$\int \sec ^{3} x d x=?$
A. $\frac{1}{2}\{\sec x \tan x-\log |\sec x+\tan x|\}+C$
B. $\frac{1}{2}\{\sec x \tan x+\log |\sec x+\tan x|\}+C$
C. $2\{\sec x \tan x+\log |\sec x+\tan x|\}+C$
D. none of these
Solution:
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