Question

Найти производную функции

Answer 1

$y'(x)= [frac{cos(x)}{x}]'= frac{(cos(x))'*x-cos(x)*(x)'}{x^2}= frac{-sin(x)*x-cos(x)*1}{x^2} =\ =-frac{xsin(x)+cos(x)}{x^2}$