Coordinate Geometry Flashcards
1
Q
cosine rule
A
a^2 = b^2 + c^2 - 2bc cosA
2
Q
sine rule
A
sinA/a = sinB/b = sinC/c
3
Q
area of a traingle
A
1/2 absinC
4
Q
arc length
A
r@
must be in radians
5
Q
sector area
A
1/2 r^2 @
must be in radians
6
Q
segment area
A
1/2 r^2 (@-sin@)
must be in the radians
