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Trigonometric Key Angles
Name __________
#1.
tan 510°
0
-2
-
√
3
3
√
2
#2.
sec
2π
3
-2
-1
2
-1
1
#3.
sec
5π
6
-2
√
3
3
-2
-1
√
3
#4.
cos 225°
√
3
3
√
3
-
√
3
2
-
√
2
2
#5.
cot
13π
2
0
-
√
3
3
√
3
2
2
#6.
cos
33π
4
√
3
2
√
2
2
2
√
3
3
-
√
3
#7.
tan
-π
3
-
√
3
-
√
3
3
2
√
3
3
1
2
#8.
tan
-47π
6
√
3
2
2
√
3
3
2
√
3
3
#9.
cos 135°
√
2
2
-
√
2
2
-1
√
3
2
#10.
sin -7π
undefined
2
√
3
3
√
3
0
#11.
sec
-19π
6
-1
-2
√
3
3
0
1
2
#12.
csc 420°
-
√
3
undefined
-
√
3
3
2
√
3
3
#13.
sec
2π
3
-2
√
3
3
-2
-1
2
-
√
3
3
#14.
csc
-29π
6
-2
√
2
2
-1
2
√
3
#15.
tan
3π
2
-
√
3
2
√
3
undefined
1
2
#16.
cot
π
2
-1
2
0
-2
√
3
3
-
√
3
2
#17.
cos 90°
0
-1
-
√
2
2
2
√
3
3
#18.
cos -1080°
-1
2
-
√
3
3
1
0
#19.
csc -1020°
-
√
3
3
√
3
2
√
3
3
-
√
3
2
#20.
sin 960°
0
-
√
3
2
√
3
2
-
√
2
2
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