Выбери верные ответы

1. \(\cos (270\degree + 45\degree) - \sin(720\degree + 30\degree) = \) [ \(\sqrt2\) | \(\dfrac{\sqrt2-1}{2}\) | \(\sqrt2+1\) ].
2. \(\sin(540\degree + 60\degree) - \tg(180\degree + 45\degree) = \) [ \(-\dfrac{\sqrt3}{2}-1\) | \(-\sqrt3\) | \(\sqrt2+1\) ].
3. \(\cos(270\degree+30\degree) - \cos(360\degree + 60\degree) = \) [ \(0\) | \(1\) | \(-1\) ].