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Trigonometric Key Angles
Name __________
#1.
cot 225°
-1
√
3
1
undefined
#2.
sec
2π
3
√
3
undefined
1
2
-2
#3.
csc
5π
4
2
√
3
3
-
√
2
-2
√
3
3
√
3
2
#4.
cos
5π
6
-
√
3
2
-
√
3
3
2
-1
#5.
csc π
-1
2
1
2
√
3
3
undefined
#6.
tan
-31π
6
-
√
2
-1
2
-
√
3
3
1
#7.
sin 6π
0
√
3
3
undefined
-
√
3
3
#8.
tan 330°
-
√
3
3
√
2
2
-
√
2
-
√
2
2
#9.
sin
7π
6
-1
2
2
√
3
2
undefined
#10.
csc
-5π
2
-
√
2
2
-
√
2
-2
-1
#11.
tan
3π
2
undefined
1
2
√
2
2
#12.
sec
5π
6
2
-2
√
3
3
1
√
3
#13.
sec
π
3
2
√
3
3
-
√
3
3
0
#14.
sin 585°
-
√
2
2
2
√
2
2
-
√
2
#15.
tan 45°
undefined
-1
1
-
√
2
2
#16.
sin
4π
3
-
√
3
2
-1
1
2
-1
2
#17.
sin 45°
-
√
3
1
2
√
3
3
√
2
2
#18.
csc 60°
2
√
3
3
√
2
undefined
√
3
#19.
csc -1200°
-2
√
3
3
-1
2
-
√
3
3
√
3
#20.
sin -630°
-2
-
√
3
-
√
3
3
1
1
A
B
C
D
2
A
B
C
D
3
A
B
C
D
4
A
B
C
D
5
A
B
C
D
6
A
B
C
D
7
A
B
C
D
8
A
B
C
D
9
A
B
C
D
10
A
B
C
D
11
A
B
C
D
12
A
B
C
D
13
A
B
C
D
14
A
B
C
D
15
A
B
C
D
16
A
B
C
D
17
A
B
C
D
18
A
B
C
D
19
A
B
C
D
20
A
B
C
D