Primitives

i just don't know how to primitivize very well

what should i do when i need to primitivize a fraction

could you please explain me clearly how this function was primitivized?
http://img369.imageshack.us/img369/1093/zzzls4.jpg

>>10
Your people spelled sin, sinh, cosh, etc. incorrectly.

Also, you're a dumbass. It's the fucking antiderivative; if you aren't mentally capable of handling this easily, you shouldn't be in any career that requires it.