Question

Hi, The integral of Sin x / Cos x ?.. Is it .. 1\2 ln cosx? .. or is it just 1\2 cosx

Answer 1

you can take the following :

u = cos x
du = -sinx dx

and you'll end up with this form:

\[\int\limits_{}^{}1/u du = \ln \left| u \right| + c = \ln \left| \cos x \right| + c\]

did you get this? :)

Answer 2

Ahh.. Ln (cosx) .. what the did i get the 1\2 from... hehe.. Thank u sstarica.

Answer 3

sorry it's:\[= - \ln |cosx| + c\]

I forgot about the (-) my bad ^^"

Answer 4

lol, no problem ^_^