Сравни

1. \(\sin \dfrac{12\pi}{11}\) и \(\sin \dfrac{13\pi}{12}\) ;

2. \(\cos (-7)\) и \(\cos (-8)\) .

Ответ: 1) [ \(\gt\) | \(\lt\) | \(=\) ]; 2) [ \(\gt\) | \(\lt\) | \(=\) ].