Converting line slopes to angles

1. Feb 17, 2005

danne89

Hi! I'm examining the equality between line slopes and angles. I've, using trig, conclude that this equation holds:
$$sin(v) = \frac{m}{ \sqrt{1+m^2}}$$
Anyone knowing a simpler equation is very welcome to post.

2. Feb 17, 2005

Muzza

$$\tan{\alpha} = m$$.

3. Feb 17, 2005

danne89

Ahhh! Why wasn't I thinking about THAT? I congratulate you for your clevernes.