Question

Найдите производную функции
f(x)=ctg(7+6x)f(x)=ctg(7+6x)

Answer 1

$\frac{d}{dx}(ctg(7+6x))=\frac{d}{dx}ctg(x)*\frac{d}{dx} (7+6x)=-\frac{6}{sin^2(7+6x)}$