Объяснение:
sin(C)=AB/BC;
cos(C)=AC/BC;
tg(C)=sin(C)/cos(C)=(AB/BC)/(AC/BC)=(AB/BC)*(BC/AC)=AB/AC;
ctg(C)=cos(C)/sin(C)=AC/AB;
Объяснение:
sin(C)=AB/BC;
cos(C)=AC/BC;
tg(C)=sin(C)/cos(C)=(AB/BC)/(AC/BC)=(AB/BC)*(BC/AC)=AB/AC;
ctg(C)=cos(C)/sin(C)=AC/AB;