Shutter Speed Conversion Help

[R.Lang]

I have two settings and I need some help converting shutter speeds to degrees.

1. Is shot at 30fps, and I want a 1/120 shutter speed. I found a formula somewhere that gave me 90 degrees, is that right?

2. Is shot at 60fps, and I want a 1/500 shutter speed. The above forumla gave me 43.2, is that right?

Much thanks.

[Nexis]

The formula for shutter speed is: 1/(360/shutter angle) * frame rate.

[R.Lang]

So then my numbers are right? I don't trust my math skills, but it appears to work.