cos(19π/4) = cos(3π/4) = -✓2/2
sin(19π/4) = sin(3π/4) = ✓2/2
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Найди cost и sint, если t равно: 19π4
cos(19π/4) = cos(3π/4) = -✓2/2
sin(19π/4) = sin(3π/4) = ✓2/2