Use an identity to find the exact value of each expression:
Note: You are not allowed to use decimals in your answer.

$\cos(402^\circ) \cos(177^\circ)+\sin(402^\circ) \sin(177^\circ)$=

$\cos(18^\circ) \cos(72^\circ)-\sin(18^\circ) \sin(72^\circ)$=