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1411275564
Trigonometric Key Angles
Name __________
#1.
\(\sin \frac{11\pi}{6}\)
\(-1\)
\(-\frac{1}{2}\)
\(0\)
\(undefined\)
#2.
\(\sin 0\)
\(-\frac{\sqrt{2}}{2}\)
\(-\frac{\sqrt{3}}{3}\)
\(0\)
\(\frac{\sqrt{3}}{2}\)
#3.
\(\csc \frac{5\pi}{6}\)
\(-1\)
\(-\frac{\sqrt{3}}{3}\)
\(2\)
\(\frac{\sqrt{2}}{2}\)
#4.
\(\tan \frac{-3\pi}{4}\)
\(1\)
\(\frac{2\sqrt{3}}{3}\)
\(\sqrt{3}\)
\(undefined\)
#5.
\(\tan 135°\)
\(-1\)
\(1\)
\(\frac{\sqrt{3}}{3}\)
\(\sqrt{3}\)
#6.
\(\sin \frac{11\pi}{6}\)
\(-\frac{1}{2}\)
\(1\)
\(2\)
\(\frac{1}{2}\)
#7.
\(\sin \frac{4\pi}{3}\)
\(-\frac{\sqrt{3}}{2}\)
\(-\sqrt{2}\)
\(2\)
\(\frac{\sqrt{3}}{3}\)
#8.
\(\cot 330°\)
\(-\frac{\sqrt{3}}{2}\)
\(-\sqrt{3}\)
\(1\)
\(\frac{1}{2}\)
#9.
\(\tan \frac{-5\pi}{4}\)
\(-1\)
\(-\frac{\sqrt{3}}{2}\)
\(-\sqrt{3}\)
\(0\)
#10.
\(\sin 240°\)
\(-1\)
\(-\frac{\sqrt{2}}{2}\)
\(-\frac{\sqrt{3}}{2}\)
\(-\frac{\sqrt{3}}{3}\)
#11.
\(\tan \frac{7\pi}{4}\)
\(-1\)
\(-\frac{1}{2}\)
\(-\sqrt{2}\)
\(-\sqrt{3}\)
#12.
\(\sec \frac{5\pi}{3}\)
\(-2\)
\(-\frac{\sqrt{2}}{2}\)
\(-\frac{\sqrt{3}}{2}\)
\(2\)
#13.
\(\sin 480°\)
\(-\sqrt{2}\)
\(\frac{1}{2}\)
\(\frac{2\sqrt{3}}{3}\)
\(\frac{\sqrt{3}}{2}\)
#14.
\(\sin \frac{\pi}{4}\)
\(\frac{1}{2}\)
\(\frac{\sqrt{2}}{2}\)
\(\frac{\sqrt{3}}{2}\)
\(\sqrt{3}\)
#15.
\(\cos 240°\)
\(-\frac{1}{2}\)
\(-\frac{\sqrt{3}}{2}\)
\(-\sqrt{3}\)
\(0\)
#16.
\(\cot \frac{\pi}{6}\)
\(-2\)
\(1\)
\(\frac{\sqrt{2}}{2}\)
\(\sqrt{3}\)
#17.
\(\cot \frac{21\pi}{4}\)
\(-\frac{\sqrt{2}}{2}\)
\(-\frac{\sqrt{3}}{3}\)
\(1\)
\(\frac{1}{2}\)
#18.
\(\tan 240°\)
\(-2\)
\(1\)
\(\frac{\sqrt{3}}{3}\)
\(\sqrt{3}\)
#19.
\(\csc \frac{-19\pi}{6}\)
\(-\frac{1}{2}\)
\(-\frac{\sqrt{3}}{3}\)
\(1\)
\(2\)
#20.
\(\tan 210°\)
\(-2\)
\(-\sqrt{3}\)
\(\frac{\sqrt{2}}{2}\)
\(\frac{\sqrt{3}}{3}\)
#21.
\(\sec \frac{5\pi}{6}\)
\(-\frac{2\sqrt{3}}{3}\)
\(1\)
\(\frac{2\sqrt{3}}{3}\)
\(\frac{\sqrt{2}}{2}\)
#22.
\(\cos 270°\)
\(0\)
\(1\)
\(\frac{2\sqrt{3}}{3}\)
\(\frac{\sqrt{3}}{3}\)
#23.
\(\sin 225°\)
\(-\frac{1}{2}\)
\(-\frac{\sqrt{2}}{2}\)
\(-\sqrt{3}\)
\(undefined\)
#24.
\(\sin \pi\)
\(-1\)
\(-\frac{\sqrt{3}}{2}\)
\(-\sqrt{2}\)
\(0\)
#25.
\(\cos 180°\)
\(-1\)
\(-\sqrt{3}\)
\(\sqrt{3}\)
\(undefined\)
#26.
\(\csc \frac{\pi}{2}\)
\(-1\)
\(1\)
\(\frac{2\sqrt{3}}{3}\)
\(\frac{\sqrt{3}}{3}\)
#27.
\(\sec 5\pi\)
\(-1\)
\(-\frac{\sqrt{2}}{2}\)
\(\sqrt{3}\)
\(undefined\)
#28.
\(\cot 150°\)
\(-\frac{\sqrt{2}}{2}\)
\(-\frac{\sqrt{3}}{2}\)
\(-\sqrt{3}\)
\(\sqrt{2}\)
#29.
\(\tan \frac{4\pi}{3}\)
\(-1\)
\(-\frac{\sqrt{2}}{2}\)
\(0\)
\(\sqrt{3}\)
#30.
\(\cos 330°\)
\(-\frac{1}{2}\)
\(0\)
\(2\)
\(\frac{\sqrt{3}}{2}\)
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
21
A
B
C
D
22
A
B
C
D
23
A
B
C
D
24
A
B
C
D
25
A
B
C
D
26
A
B
C
D
27
A
B
C
D
28
A
B
C
D
29
A
B
C
D
30
A
B
C
D