Trig identities Flashcards
1
Q
cot
A
1/tan
cos/sin
2
Q
cosec
A
1/sin
3
Q
sec
A
1/cos
4
Q
Sec(^2)x
A
1 + tan(^2)x
5
Q
cosec(^2)
A
1 + cot(^2)
6
Q
tan(x+y)
A
tanx + tany / 1 + tanxtany
7
Q
sin2x
A
2sinxcosx
8
Q
cos2x
A
cos(^2)x - sin(^2)x
2cos(^2)x -1
1 - 2sin(^2)x
9
Q
tan2x
A
2tanx / 1 - tan(^2)x
