trigonometry rules Flashcards
1
Q
Formula for finding missing lengths using sine rule
A
a ÷ sin(A)
b ÷ sin(B) =
c ÷ sin(C)
2
Q
Formula for finding missing angles using sine rule
A
sin(A) ÷ a
sin(B) ÷ b =
sin(C) ÷ c
3
Q
Formula for finding missing lengths using cosine rule
A
a² = b² + c² - 2bcCos(A)
4
Q
Formula for finding missing angles using cosine rule
A
Cos(A) =b² +c² - a² ÷ 2bc
