Trigonometry Flashcards
1
Q
When given a side and the angle opposite the side and a side is required we use…
A
Sine rule
a b c
— = — = —
SinA sinB SinC
2
Q
When given a side and the angle opposite the side and an angle is required we use…
A
We use sine rule
SinA SinB SinC
—- = —- = —-
a b c
3
Q
When we have two sides and an angle not opposite a side and a side is required
A
Cosine rule
a^2 = b^2+c^2 - 2bcCosA
4
Q
When we have two sides and an angle not opposite a side and the area is required
A
Area=1/2abSinC
5
Q
All three sides are given and an angle is required
A
CosA= b^2 + c^2 - a^2
—————-
2bc
