Vypočítaj:
\( \normalsize-\cos180\degree+\cos45\degree-\sin90\degree+\cotg45\degree+\sin270\degree \)
\( \large\frac{\sqrt2}{2} \)
\( \large\frac{\sqrt3}{2} \)
\( \large\frac{\sqrt2}{3} \)
\( \large\frac{1}{2} \)