sin(750°)=sin(30°+2*360°)=sin(30°)=1/2
ctg(945°)=ctg(45°+5*180°)=ctg(45°)=1
cos(1140°)=cos(60°+3*360°)=cos(60°)=1/2
tg(-495°)=-tg(495°)=-tg(135°+2*180°)=-tg(135°)=-(-1)=1
Получаем:
Ответ: Е) 3
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sin(750°)=sin(30°+2*360°)=sin(30°)=1/2
ctg(945°)=ctg(45°+5*180°)=ctg(45°)=1
cos(1140°)=cos(60°+3*360°)=cos(60°)=1/2
tg(-495°)=-tg(495°)=-tg(135°+2*180°)=-tg(135°)=-(-1)=1
Получаем:
Ответ: Е) 3