Найти значение выражения √48*cos^2*7п/12-√12
√48cos²7π/12-√12=√48*(1+cos7π/6)-√12=√48*(1+cos(π+π/6))-√12= =√48*(1-cosπ/6)-√12=4√3-4√3*√3/2-2√3=2√3-2√3=0