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
16
Q
sin(A-B)
A
sinAcosB - cosAsinB
17
Q
cos(A+B)
A
cosAcosB - sinAsinB
18
Q
cos(A-B)
A
cosAcosB + sinAsinB
19
Q
tan(A+B)
A
tanA + tanB / 1 + tanAtanB
20
Q
tan(A-B)
A
tanA - tanB / 1 - tanAtanB
21
Q
What is arctan equal to
A
tan-1
22
Q
What is arccos equal to
A
cos-1
23
Q
What is arcsin equal to
A
sin-1
24
Q
Domain of y = arcsin x
A
-1 <= x <= 1
25
Range of y = arcsin x
-90 <= x <= 90
26
Domain of y = arccos x
-1 <= x <= 1
27
Range of arccos x
0 <= x <= 180
28
Domain of y = arctan x
x E R
29
Range of y = arctan x
-90 <= x <= 90
