trig identities Flashcards
1
Q
1/cosx
A
secx
2
Q
1/sinx
A
cosecx
3
Q
1/tanx
A
cotx
4
Q
sinx/cosx
A
tanx
5
Q
tan2x
A
2tanx/1-tan^2x
6
Q
sin(A+B)
A
sinAcosB+cosAsinB
7
Q
sin(A-B)
A
sinAcosB-cosAsinB
8
Q
cos(A+B)
A
cosAcosB-sinAsinB
9
Q
cos(A-B)
A
cosAcosB+sinAsinB
10
Q
sin2x
A
2sinxcosx
11
Q
sin^2x+cos^2x
A
1
12
Q
tan(A+B)
A
tanA+tanB/1-tanAtanB
13
Q
cosec^2x
A
1+cot^2x
14
Q
sec^2x
A
tan^2x+1
15
Q
cos2x
A
cos^2x-sin^2x
