Производность найти cos(2x+)+ x=
Cos(2x+π/2+(x-π²)/x=-sin2x+(x-π²)/x (-sin2x+(x-π²)/x)`=-2cos2x+(x-x+π²)/x²=-2cos2x+π²)/x²=-2cosπ/6+π²:(π/12)2= =-2*√3/2+π²*144/π²==-√3+144