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=2,42352432 : 0,8988²=2,42352432:0,80784144=3
sin64 = sin(90-26) = cos26 Teraz licznik ma postać:
3*cos26*cos26
Mianownik: cos26*cos26 (bo 90-64 = 26)
Po skróceniu wychodzi liczba 3.