All Trig Identities Flashcards
1
Q
cosec x is the same as
A
1/sin x
2
Q
sec x is the same as
A
1/cos x
3
Q
tan x is the same as
A
sin x / cos x
4
Q
cot x is the same as
A
cos x / sin x AND/OR 1/tan x
5
Q
sin^2 x + cos^2 x is the same as
A
1
6
Q
1 - sin^2 x is the same as
A
cos^2 x
7
Q
1 - cos^2 x is the same as
A
sin^2 x
8
Q
tan^2 x + 1 is the same as
A
sec^2 x
9
Q
1 + cot^2 x is the same as
A
cosec^2 x
10
Q
sin(2x) is the same as
A
2sinxcosx
11
Q
cos(2x)
A
cos^2x - sin^2x
12
Q
cos(2x)
A
2cos^2x - 1
13
Q
cos(2x)
A
1 - 2sin^2x
14
Q
tan(2x)
A
2tanx / 1 - tan^2 x
15
Q
sin(A+B)
A
sinAcosB + cosAsinB
