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Question
Write the value of\[\int\sec x \left( \sec x + \tan x \right)\text{ dx }\]
Solution
\[\int\sec x \left( \sec x + \tan x \right) dx\]
\[ = \int\left( \sec^2 x + \sec x \tan x \right) dx\]
\[ = \tan x + \sec x + C\]
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