Trig Identities Flashcards
0
Q
sinx divided by cosx
A
tan x
1
Q
sin^2 + cos^2
A
1
2
Q
1-sin^2
A
cos^2
3
Q
1-cos^2
A
sin^2
4
Q
1/sinx
A
cscx
5
Q
cosx/sinx
A
cotx
6
Q
1/cosx
A
secx
7
Q
1/tanx
A
cotx
8
Q
tan^2 + 1
A
sec^2
9
Q
cot^2 + 1
A
csc^2
10
Q
sin(-x)
A
-sinx
11
Q
cos(-x)
A
cosx
12
Q
tan(-x)
A
-tanx
13
Q
sin((pi divided by 2)-x)
A
cosx
14
Q
sin (s+t)
A
sin(s) cos(t) + cos(s) sin(t)
15
Q
sin(s-t)
A
sin(s) cos(t) - cos(s) sin(t)
16
Q
cos (s+t)
A
cos(s) cos(t) - sin(s) sin(t)
17
Q
cos (s-t)
A
cos(s) cos(t) + sin(s) sin(t)
18
Q
tan(s+t)
A
tan(s)+tan(t)/1-tan(s) tan(t)
19
Q
tan(s-t)
A
tan(s)-tan(t)/1+tan(s) tan(t)
20
Q
sin(2x)
A
2sinx cosx
21
Q
cos(2x)
A
cos^2 - sin^2
22
Q
cos(x/2)
A
+or- rad (1+cosx/2)
23
Q
sin(x/2)
A
+or- rad(1-cosx/2)
24
cos((pi/2)-x)
sinx
