θ	cos(θ)
0.0	1.000
5.0	0.996
10.0	0.984
15.0	0.965
20.0	0.939
25.0	0.906
30.0	0.866
35.0	0.819
40.0	0.766
45.0	0.707
50.0	0.642
55.0	0.573
60.0	0.500
65.0	0.422
70.0	0.866
75.0	0.258
80.0	0.173
85.0	0.087
90.0	0.000