Сравни

1. \(\sin \dfrac{17\pi}{8}\) и \(\sin \dfrac{19\pi}{9}\) ;

2. \(\cos (-3)\) и \(\cos (-2)\) .

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