cosine+sine rules Flashcards
1
Q
What is the cosine rule for working out a length?
A
a squared = b squared+c squared- 2bc(cos A)
2
Q
What is the cosine rule for working out an angle?
A
(CosA)=(b squared+ c squared -a squared) / 2bc
3
Q
What is the sine rule for working out a length?
A
a/sin A =b/sin B
4
Q
What is the sine rule for working out an angle?
A
sin A/a =sin B/b
