\[
\int \sec x d x=?
\]
\( \mathrm{P} \)
(a) \( \log |\sec x-\tan x...
\[
\int \sec x d x=?
\]
\( \mathrm{P} \)
(a) \( \log |\sec x-\tan x|+C \)
(b) \( -\log |\sec x+\tan x|+C \)
W
(c) \( \log |\sec x+\tan x|+C \)
(d) none of these
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