Упрости выражения \sin 162^{\circ} \sin 18^{\circ} - \cos 162^{\circ} \cos 18^{\circ} = \sin (180^{\circ} - ^{\circ} ) \sin 18^{\circ} - \cos (180^{\circ} - ^{\circ} ) \cos 18^{\circ} = . \cos 35^{\circ} \cos 145^{\circ}

Задание

Упростивыражения

\(\sin162^{\circ}\sin18^{\circ} - \cos162^{\circ}\cos18^{\circ}=\sin(180^{\circ} - \) [ ] \(^{\circ})\sin18^{\circ} - \cos(180^{\circ} - \) [ ] \(^{\circ})\cos18^{\circ}=\) [ ].
\(\cos35^{\circ}\cos145^{\circ} - \sin35^{\circ}\sin145^{\circ}=\) [ ].