cos 30 = AC/AB АС= cos 30* AB= (3^(1/2))/2*(3^(1/2))= 1.5 AB^2=BC^2+AC^2 откуда АС= (AB^2- BC^2)^(1/2)= (3-0,75)^(1/2)=1.5
cos 30 = AC/AB
АС= cos 30* AB= (3^(1/2))/2*(3^(1/2))= 1.5
AB^2=BC^2+AC^2
откуда АС= (AB^2- BC^2)^(1/2)= (3-0,75)^(1/2)=1.5