Trig Identities Flashcards
1
Q
1+tan^2(x)
A
sec^2(x)
2
Q
1+cot^2(x)
A
csc^2(x)
3
Q
sin(u+/-v)
A
sin(u)cos(v)+/-cos(u)sin(v)
4
Q
cos(u+/-v)
A
cos(u)cos(v)+/-sin(u)sin(v)
5
Q
tan(u+/-v)
A
(tan(u)+/-tan(v))/(1-/+tan(u)tan(v))
6
Q
sin(2u)
A
2sin(u)cos(u)
7
Q
cos(2u)
A
cos^2(u)-sin^2(u)
2cos^2(u)-1
1-2sin^2(u)
8
Q
tan(2u)
A
2tan(u)/(1-tan^2(u))
9
Q
sin^2(u)
A
(1-cos(2u))/2
10
Q
cos^2(u)
A
(1+cos(2u))/2
11
Q
tan^2(u)
A
(1-cos(2u))/(1+cos(2u))
