Sine rule

yes what do you want to know about it?

yes, SinA/a = SinB/b, where A is an angle and a is a length of a triangle
this may help: https://www.youtube.com/watch?v=RL2F49BwQTA

~

Thank you so much,
you have literally saved me
because I doing an exam practice paper for my maths revision
and I was panicking
I wouldn't call it revision though as Im asking for help
well that's just me LOL
thanks again

Sine rule for angles is Sin(A)/a=Sin(B)/b
Cosine rule for angles is Cos(A) =b² + c² - a²/2bc Therefore A = Cos^-1(b² + c² - a²/2bc)