SINE AND COSINE RULE

Question 1

If there were to find an angle with 3 sides what formula would you use?

Answer 1

cosine rule: b^2+c^2-a^2/2xbxc

Question 2

If there were 2 sides and an angle, what formula would you use to find the 2nd angle?

Answer 2

Sine rule: a/SinA = b/Sinb

Question 3

if There are three 2 sides and an angle and you need to find the 3rd side, what formula would you use?

Answer 3

cosine rule: a^2= b^2+c^2-2bcCosA