Also remember that cos(x) = cos(x+k*360º) and cos(x+k*360º)
sine(x) = sine(180ºx+2k*180º) and sine(x+k*360º)
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You need only 2 objectives in life:
when you look at the past and you say that you coudn't have done any better than that is the 1º one.
The 2º one is to do better than that
Then, you must learn 2 rules in your life:
Rule number one : respect yourself and the others
Rule number two: first learn rule number one
