# Find the Anti-derivative (NEED HELP ASAP)

• Feb 9th 2009, 12:01 AM
VkL
Find the Anti-derivative (NEED HELP ASAP)
Find an antiderivative. http://www.webassign.net/www31/symIm...b5e40f147d.gif

How do you integrate ( 1 / [(cos ^ 2) t]) ??

The
antiderivative of Cos(t) = sine(t), then I am lost. Help please!

• Feb 9th 2009, 12:09 AM
o_O
Recall that: $\frac{1}{\cos x} = \sec x$

So you have: $\int p(t) dt = \int \left(\cos t + \sec^2 t\right) dt$

Do you remember anything whose derivative is equal to $\sec^2 t$ ;)?
• Feb 9th 2009, 12:18 AM
VkL
Tan(t) ? haha