+0 +1 +2 +3 +4
----------------------------------------------
0 0.0000 0.0175 0.0349 0.0523 0.0698
5 0.0872 0.1045 0.1219 0.1392 0.1564
10 0.1736 0.1908 0.2079 0.2250 0.2419
15 0.2588 0.2756 0.2924 0.3090 0.3256
20 0.3420 0.3584 0.3746 0.3907 0.4067
25 0.4226 0.4384 0.4540 0.4695 0.4848
30 0.5000 0.5150 0.5299 0.5446 0.5592
35 0.5736 0.5878 0.6018 0.6157 0.6293
40 0.6428 0.6561 0.6691 0.6820 0.6947
45 0.7071 0.7193 0.7314 0.7431 0.7547
50 0.7660 0.7771 0.7880 0.7986 0.8090
55 0.8192 0.8290 0.8387 0.8480 0.8572
60 0.8660 0.8746 0.8829 0.8910 0.8988
65 0.9063 0.9135 0.9205 0.9272 0.9336
70 0.9397 0.9455 0.9511 0.9563 0.9613
75 0.9659 0.9703 0.9744 0.9781 0.9816
80 0.9848 0.9877 0.9903 0.9925 0.9945
85 0.9962 0.9976 0.9986 0.9994 0.9998
----------------------------------------------
85 deg. 86 deg. 87 deg. 88 deg. 89 deg.
sin(a) == cos(90 - a), so cos(30) = sin(60).
2012.06.15 - YON - Jan C. Hardenbergh