equations Flashcards
1
Q
sine rule for a side
A
a/sinA = b/sinB = c/sinC
2
Q
sine rule for an angle
A
sinA/a = sinB/b = sinsC/c
3
Q
cosine rule for a side
A
a² = b²+c²-2bcCosA
4
Q
cosine rule for an angle
A
cosA = b²+c²-a²/2bc
5
Q
area of any triangle
A
area = 1/2abSinC
6
Q
sinx
A
opp/hyp
7
Q
cosx
A
adj/hyp
8
Q
tanx
A
opp/adj
9
Q
area of parallelogram
A
base x height
10
Q
area of trapezium
A
1/2(a+b)h
11
Q
volume of pyramid
A
1/3area of base x vertical height
12
Q
quadratic formula
A
-b±√(b²-4ac)/2a
