Question

производность найти cos(2x+$frac{ pi }{2}$)+$frac{x- pi ^{2} }{x}$       x=$frac{pi}{12}$

Answer 1

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