Oblicz: tg 930 sin 660
tg 930= tg (720+210)= tg (2*360+210)= tg 210= tg(180+30)=tg 30 =√3/3 ( III ćwiartka)
sin 660= sin (720 - 60)= sin(2*360-60)=sin(-60)=-sin 60 =- √3/2 ( IV ćwiartka)
co to znaczy tg 930 i sin 660
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tg 930= tg (720+210)= tg (2*360+210)= tg 210= tg(180+30)=tg 30 =√3/3 ( III ćwiartka)
sin 660= sin (720 - 60)= sin(2*360-60)=sin(-60)=-sin 60 =- √3/2 ( IV ćwiartka)
co to znaczy tg 930 i sin 660