# Help using latex

1. Jan 29, 2010

### 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?

Last edited by a moderator: Jan 30, 2010
2. Jan 30, 2010

### cristo

Staff Emeritus
Like that...

3. Jan 30, 2010

### Rajini

use \sin for sin ?

4. Feb 2, 2010

### Redbelly98

Staff Emeritus
Yes.
$$\sin \theta$$​
Also, you can click on any Latex equation to view the code used to make it.