sine and cos rule Flashcards
1
Q
what is the sine rule (equation)
A
sin(A)/a = sin(B)/b = sin(C)/c
2
Q
when do you use sine rule
A
when it’s NOT a right angle but missing a side/angle
3
Q
which equation do you use with a missing angle
A
sin-1 OR cos-1
4
Q
which equation do you use for a missing side
A
sin(_)
5
Q
where does x always sit
A
at the top
6
Q
when do you use sin-1
A
missing an angle
7
Q
when do you use the cos rule
A
missing an angle/ side but NOT a right angle
8
Q
what is the cos rule equation
A
A2 = B2 + C2 - 2BcCos(A)
