
Trigonometric table are crazy 
This trigonometrical table is an example of mathematical marasmus. I am touched by exact values of a sine and cosine. No comments.
If mathematicians do not know what is trigonometric functions, let read
here. If mathematicians are not able to divide into zero, let
study. I like the idea of this table. I do not like its contents. I corrected this trigonometrical table.

Trigonometric table 
The most popular angles are highlighted with blue color.
0, 30, 45, 60, 90 degrees most often occur in textbooks.Common fractions will be useful to pupils to fight against teachers. Decimal fractions will be useful physics and to engineers to calculations.
In this trigonometrical table there are no cotangents (
cot, cotan, cotg, ctg, ctn). Anything terrible. There are useful formulas which will help you.

Useful formulas 
Sin 0, 15, 22.5, 30, 45, 60, 67.5, 75, 90, 120, 135, 150, 180 degrees in this table.
Cos 0, Pi/12, pi/8, pi/6, pi/4, pi/3, 3/8 pi, 5/12 pi, pi/2, 2/3 pi, 3/4 pi, 5/6 pi, 1 pi radians.
Tan pi/2 radians or 90 degrees it
makes sense.