identities Flashcards
1
Q
sec^2 =
A
sec^2 = Tan^2 + 1
2
Q
tan^2 =
A
tan ^2 = 1 - sec^2
3
Q
csc^2 =
A
1 + cot^2
4
Q
cot^2=
A
1 - csc^2
5
Q
cos(x-y) =
A
cos(x)cos(y) + sin(x)sin(y)
6
Q
cos(x+y)=
A
cos(x)cos(y) - sin(x)sin(y)
7
Q
sin(x-y)=
A
sin(x)cos(y) - cos(x)sin(y)
8
Q
sin(x+y) =
A
sin(x)cos(y) + cos(x)sin(y)
9
Q
tan(x-y)=
A
tan(x)-tan(y)/
1 + tan(x)tan(y)
10
Q
tan(x+y)=
A
tan(x)+tan(y)/
1-tan(x)tan(y)
11
Q
sin(2x) =
A
2sin(x)cos(x)
12
Q
cos2(x) =
A
cos^2(x) - sin^2(x), 1 - 2sin^2(x), 2cos^2(x) -1
13
Q
Tan2(x)
A
2tanx/
1-tan^2x
