More Precalc Flashcards
0
Q
cot =
A
tan ^ -1
1
Q
tan =
A
sin / cos
2
Q
sec =
A
cos ^ -1
3
Q
csc =
A
sin ^ -1
4
Q
first identity formula
A
cos^2 + sin^2 = 1
5
Q
identity formula of sec^2
A
1 + tan^2 = sec^2
6
Q
identity of csc
A
1 + cot^2 = csc^2
7
Q
cos addition formula
cos(A + B) =
A
cos(A + B) = (cos A)(cos B) - (sin A)(sin B)
8
Q
sin addition formula
sin (A + B) =
A
sin (A + B) = sin A cos B + cos A sin B
9
Q
cos double angle formula cos 2(radian) =
A
cos 2(radian) = cos^2 - sin^2
10
Q
sin double angle formula sin 2(radian) =
A
sin 2(radian) = 2 * sin * cos
11
Q
cos half angle formula
cos^2 =
A
cos^2 = (1 + cos(2radian))/2
12
Q
sin half angle formula
sin^2 =
A
sin^2 = (1-cos(2radian))/2
