Найди значения выражений и запиши ответы

1. \(\sin 0\degree\cdot \cos 180\degree+\tg 0\degree=\) [ ].
2. \(\sin 90\degree:\cos 0\degree+\cos 180\degree=\) [ ].
3. \(\cos 90\degree+\sin 90\degree:\cos 0\degree=\) [ ].
4. \(\sin 90\degree+\cos 0\degree+\cos 90\degree=\) [ ].