Question

Ctg(2/x) * arccos√2
Производная​

Answer 1

$2=const; ,; sqrt2=const; ,; ; arccossqrt2=const; ,; ; (const)'=0\\\y=ctgfrac{2}{x}cdot arccossqrt2\\y'=arccossqrt2cdot frac{-1}{sin^2frac{2}{x}}cdot frac{-2cdot 1}{x^2}=frac{2cdot arccossqrt2}{x^2cdot sin^2frac{2}{x}}$