Question 18

Evaluate the following.
$$\sin 25^{\circ} \sin 65^{\circ} - \cos 25^{\circ} \cos 65^{\circ}$$.

Create a FREE account and get:

Evaluate the following.$$\sin 25^{\circ} \sin 65^{\circ} - \cos 25^{\circ} \cos 65^{\circ}$$.