Вычислите cos54°cos6°-sin54°sin6°.

\[\cos{54{^\circ}}\cos{6{^\circ}} - \sin{54{^\circ}}\sin{6{^\circ}} =\]

\[= \cos(54{^\circ} + 6{^\circ}) = \cos{60{^\circ}} = \frac{1}{2}\]