14 Dec 2008, 11:58 p.m.

# A Second Cheat Sheet: the Sine Rule and the Cosine Rule

NoneMore adventures in MST121: Using Mathematics. *B3: Modelling with Vectors* took an unexpected turn into matters of triangle geometry - and not the more beginner-friendly right-angled variety either - which left me getting to grips with the Sine Rule and the Cosine Rule.

Much like my experiences with Sigma Notation, the principles are straightforward, but I kept failing to spot which equations to apply.

So I've knocked up a further cheat sheet. Here are the files:

Posted by Simon at 01:53:00 PM

16 Feb 2009, 2:11 p.m.

16 Feb 2009, 5:39 p.m.

## Simon Harris

Colin - thanks for dropping by, isn't it a small world! I'm just starting MS221 any day now, just as soon as I can get this stubborn calculus TMA out of the way...it's driving me up the wall.

## Colin Blackburn

I was drawn here via the blog of another fifteensquared blogger...Smutchin. Nice to see another crossword blogger studying maths with the OU. I did MST121 a few years ago now. The guy who runs Listen With Others is another one, I think he's doing 121 and MS221 this year.