# Antideriv of trig function

• January 12th 2010, 02:23 PM
jebckr
Antideriv of trig function
∫(tan^2)x)(sec^2)x)
• January 12th 2010, 02:27 PM
pickslides
$\int \tan^2(x)\sec^2(x)~dx$

make $u =\tan(x) \implies \frac{du}{dx}= sec^2(x)$

So

$\int u^2~du$

What do you think about that?
• January 12th 2010, 02:44 PM
jebckr
Thanks so much! I didnt know I could use just tan(x) as u when it was squared in the problem