Cosine Rule

1. Jun 3, 2007

thomas49th

Hi, I recall that when you use the cosine rule you can sometimes come out with 2 answers (somthing to do with cos graph?). I cant qutie remeber and I've looked through my books and I cant find it. I can use the rule to calculate one side or angle, but when do you get 2 answers? Can someone please explain.

Thankyou
:)

2. Jun 3, 2007

danago

I think its called the "Ambiguous case". Not 100% sure though.

3. Jun 3, 2007

thomas49th

Thanks but I just checked and that's with sin rule :(

4. Jun 3, 2007

danago

Oh ok, my mistake then. Guess it was worth a shot anyway :P

5. Jun 3, 2007

thomas49th

you're actually right, I made the mistake thinking it was with cosine! I accidently came accross an webpage a few miutes ago when searching for some other maths stuff. It was a good guess :surprised

Cheerz
:tongue: