1)Ctg330° * sin135° 2)tg300°+3ctg240°
1)ctg330° × sin135°=ctg(360°-30°)×sin(90°+45°)= =-ctg30°×cos45°= 2)tg300°+3ctg240°=tg(360°-60°)+3ctg(270°-30°)=-tg60°+3tg30°=