Evaluate:
To find: 
Formula Used:
1. sec2 x = 1 + tan2 x
2. 
Dividing by cos2 x in the numerator and denominator,
Let y = tan x
dy = sec2 x dx
Therefore,
⇒ log |y + 2| + C
Since y = tan x,
⇒ log |tan x + 2| + C
Therefore,
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