Sine + Cosine rule Flashcards
1
Q
What is the sine rule?
A
a/sinA = b/sinB = c/sinC -OR- sinA/a = sinB/b = sinC/c
2
Q
What is the cosine rule?
A
a2 = b2 + c2 - 2bc cos A OR b2 = a2 + c2 - 2ac cos B OR c2 = a2 + b2 - 2ab cos C
3
Q
When can you use the sine rule?
A
when you are given two sides and an angle opposite to one of the two sides, and one side and any two angles.
4
Q
When can you use the cosine rule?
A
when you are given two sides and an angle, and three sides.
