1
Q
even fxn
A
f(-x) = f(x)
cos (-30) = cos (30)
2
Q
tan(-θ)
equivalent
A
-tan θ
3
Q
π periodicity
A
tan
cot
4
Q
tan π/4
(45°)
A
1
5
Q
tan π/6
(30°)
A
√3/3
6
Q
cos π/6
(30°)
A
√3/2
7
Q
cos 2π
(360°)
A
1
8
Q
D&R: cos
A
D: (-∞,∞)
R: [-1,1]
9
Q
cos π
(180°)
A
-1
10
Q
sec(-θ)
A
sec θ
11
Q
cos π/3
(60°)
A
1/2
12
Q
tan π
(180°)
A
0
13
Q
D&R: Sin
A
D: (-∞,∞)
R: [-1,1]
14
Q
D&R: cot
A
D: Θ not multiple of π
R: (-∞,∞)
15
Q
D&R: sec
A
D: Θ not odd π/2
R: (-∞, -1] U [1, ∞]
16
Q
odd fxn
A
f(-x) = -f(x)
sin (-30) = -sin(30)
17
Q
sin 0
(0°)
A
0
18
Q
1 + cot² θ
A
csc² θ
19
Q
even or odd: sec
A
even
respect to y
20
Q
tan 0/ (0°)
A
0
21
Q
cos 0
(0°)
A
1
22
Q
period tan & cot
A
π
23
Q
tan π/2
(90°)
A
Undefined
24
Q
cos π/4
(45°)
A
√2/2
25
even or odd: cos
even
respect to y
26
tan 2π
(360°)
0
27
even or odd: tan
odd
respect to origin
28
even or odd: cot
odd
respect to origin
29
1 + tan² θ
sec² θ
30
even or odd: sin
odd
respect to origin
31
sin 2π
(360°)
0
32
sin π/6
(30°)
1/2
33
tan π/3
(60°)
√3
34
cos(-θ)
cos θ
35
sin(-θ)
-sin θ
36
D&R: csc
D: Θ not multiple of π
R: (-∞, -1] U [1, ∞]
37
sin π
(180°)
0
38
even or odd: csc
odd
respect to origin
39
cos π/2
(90°)
0
40
D&R: tan
D: Θ not odd π/2
R: (-∞,∞)
41
sin π/3
(60°)
√3/2
42
csc(-θ)
-csc θ
43
cot(-θ)
-cot θ
44
sin² θ + cos² θ
1
45
sin π/2
(90°)
1
46
sin π/4
(45°)
√2/2
Trig MATH 1620
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