# Integrazio-konstante

${\displaystyle \int \cos(x)\,dx=\sin(x)+K.}$
 ${\displaystyle {d \over dx}[\sin(x)+K]}$ ${\displaystyle ={d \over dx}[\sin(x)]+{d \over dx}(K)}$ ${\displaystyle =\cos(x)+0\,}$ ${\displaystyle =\cos(x)\,.}$