2.3 Extending the unit circle

What is sin(2)
0.9
-0.4
1
0.71
What is cos(2)
-0.26
0.8
-0.4
0.4
What is cos(4)
0.5
-0.7
0.71
0.7
What is sin(5.5)
0.5
1
-0.7
0.7
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