计算:tan(45)sin(45)-2cos(30)cos(45)+tan(30)=
问题描述:
计算:tan(45)sin(45)-2cos(30)cos(45)+tan(30)=
答
tan(45)sin(45)-2cos(30)cos(45)+tan(30)
=1*√2/2-2*√3/2*√2/2+√3/3
=√2/2-√6/2+√3/3