Zadanie nr 2 z Matury rozszerzonej z matematyki 2021

$f(x)=\small\displaystyle\frac{\cos x+1}{|\cos x|+1}$

$f(x)=\small\displaystyle\frac{\sin x+1}{|\sin x|+1}$

$f(x)=\small\displaystyle\frac{|\cos x|-2}{\cos x-2}$

$f(x)=\small\displaystyle\frac{|\sin x|-2}{\cos x-2}$