Вычислите (sin π/12-cos π/12)^(2)
(sin π/12–cos π/12)^(2)=sin^(2)(π/12)-2sin(π/12)*cos(π/12)+cos^(2)(π/12)= =1-sin(2*(π/12))=1-sin(π/6)=1-(1/2)=1/2=0,5.
