Question

y'=ctgx/x производная

Answer 1

$y'= (ctgx/x)' = frac{(ctgx)'*x - ctgx*x'}{ x^{2} } = frac{- frac{1}{sin^2x}*x - ctgx}{ x^{2} } = \ \ = - frac{1}{x*sin^2x} - frac{ctgx}{ x^{2} }$