# Solve for Alpha

1. Sep 18, 2004

### physics_dude

i have this equation. While working on a problem i came across this. I need to solve for alpha. I cant seem to get anywere. I tried the problem two ways and end up havin the same problem so any help be appreciated. Thanks in advance

Solve for alpha

M/rF = Sin(alpha)Cos(theta) + Sin(theta)Cos(alpha)

(this is as far as i would get than get stuck
i no the value for M,r,F,theta. Need to find alpha
thanks a lot

2. Sep 18, 2004

### Tide

$\sin (a+b) = \sin a \cos b + \cos a \sin b$

3. Sep 18, 2004

### physics_dude

got it
thanks

4. Sep 18, 2004

### Pyrrhus

Here's a wild idea

$$\arcsin(\frac{M}{rF}) = \theta + \alpha$$

Edit: Oh damn, just when i was typing it