Question

Найдите производную функции f(x)=ctg(2x^2-$sqrt{2}$

Answer 1

$f`(x)= -frac{1}{sin^2(2x^2- sqrt{2}) }*(2x^2- sqrt{2})`= -frac{1}{sin^2(2x^2- sqrt{2}) }*4x= \ = -frac{4x}{sin^2(2x^2- sqrt{2}) }$