trigonometric ratios Flashcards
1
Q
sin θ (right-angled triangle)
A
o/ h
2
Q
cos θ (right-angled triangle)
A
a/ h
3
Q
tan θ (right-angled triangle)
A
o/ a
4
Q
sin (180 - θ)
A
sin θ
5
Q
cos (180 - θ)
A
- cos θ
6
Q
area of triangle
A
1/2 ab sin θ
7
Q
sine rule
A
a/ sin A = b/ sin B = c/ sin C
8
Q
cosine rule
A
a2 = b2 + c2 - 2ab sin C
