Posting Complex Equations: Tips & Tricks

[PhysicsMark]

Hello. I have a very large, very complex equation to post here at the forums. I just finished writing it in Latex but I am having problems posting it. In the past I have always used the short cut keys, but this time a wrote out the whole thing.

Here is one part in Latex:
$$A= (cos(2ka)-(i\epsilon/2)sin(2ka))e^{2ia\lambda}F+(i\eta/2)sin(2ka)G$$

Does anyone know how to make that look like I want it to?

 

[cristo]

Like that...

 

[Rajini]

use \sin for sin ?

 

[Redbelly98]

Yes.

$$\sin \theta$$​

Also, you can click on any Latex equation to view the code used to make it.