sin 120= sin(180-60)=sin 60=√3/2
cos 120 =cos(180-60)=-cos 60 = -1/2
tg 120 = tg (180-60) = -tg 60=-√3
ctg 120= ctg (180-60)=-ctg 60=-1/√3
sin 120= sin(180-60)=sin 60=√3/2
cos 120 =cos(180-60)=-cos 60 = -1/2
tg 120 = tg (180-60) = -tg 60=-√3
ctg 120= ctg (180-60)=-ctg 60=-1/√3