Trig Identities Flashcards
1
Q
cos^2(x)=
A
1-sin^2(x)
Or
(1+cos(2x))/2
2
Q
Cos(x+y)=
A
Cos(x)cos(y)-sin(x)sin(y)
3
Q
Cos(2x)
A
Cos^2(x)-sin^2(x)
4
Q
Sin(2x)
A
2sin(x)cos(x)
5
Q
Integral of sin(x)
A
-cos(x)
6
Q
Integral of cos(x)
A
Sin(x)
7
Q
Integral of tan(x)
A
ln|sec(x)|
8
Q
Integral of sec
A
ln|sec(x)+tan(x)|
9
Q
Integral of cot(x)
A
ln|sin(x)|
10
Q
Integral of csc(x)
A
-ln|csc(x)+cot(x)|
11
Q
sec^2(x)
A
tan^2(x)+1
12
Q
tan^2(x)
A
sec^2(x)-1
13
Q
csc^2(x)
A
1+cot^2(x)
14
Q
cot^2(x)
A
csc^2(x)-1
15
Q
cos^-1(x)
A
sec(x)
