Odpowiedzi

2009-05-16T22:18:20+02:00
Sin 150 = Sin(90+60) = Sin90 x cos60 + cos90 x Sin60 = 1/2 + 0
Cos 150 = Cos(90+60) = Cos90 x Cos60 - Sin90 x Sin60 = 0 - 1 x √3/2 = - √3 /2

Pozdrawiam :)
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