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Find the exact values of cos 0 and sin 0 for -120
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Find the exact values of cos 0 and sin 0 for -120

User Andras Sanislo
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sin (-120) = sin(180-60)=sin60= ( √(3) )/(2) \\ cos(-120)=-cos(180-60)=-cos60=- (1)/(2)
User Drew Landgrave
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