Trig Identities & Equations Flashcards
1
Q
sin(180-x)
A
sinx
2
Q
cos(-x)
A
cosx
3
Q
sin30
A
0.5
4
Q
sin45
A
(2)^-0.5
5
Q
sin60
A
(3)^0.5/2
6
Q
cos30
A
(3)^0.5/2
7
Q
cos45
A
(2)^-0.5
8
Q
cos60
A
0.5
9
Q
tan30
A
(3)^-0.5
10
Q
tan45
A
1
11
Q
tan60
A
(3)^0.5
12
Q
tan90
A
Undefined
13
Q
(sinx)^2 + (cosx)^2 = ?
A
1
14
Q
tanx = a/b
A
a = sinx b = cosx
15
Q
1/cosx
A
secx
16
Q
1/sinx
A
cosecx
17
Q
1/tanx
A
cotx
cosx/sinx
18
Q
sin(a+b)
A
sin(a)cos(b) + cos(a)sin(b)
19
Q
cos(a+b)
A
cos(a)cos(b) - sin(a)sin(b)
20
Q
tan(a+b)
A
(tan(a) + tan(b))/(1 -tan(a)tan(b))
21
Q
sin2x
A
2sin(x)cos(x)
22
Q
cos(2x)
A
cos^2(x) - sin^2(x)
2cos^2(x) - 1
1 - 2sin^2(x)
23
Q
tan2x
A
(2tan(x))/(1-tan^2(x))
