Question

(6. cos' cos 30 + sine sin 30 = cos 20​

Answer 1

Step-by-step explanation:

· If you need a refresher, you'll find sine and cosine at ... Since 60° = 90° − 30 °, notice that sin 60° = cos 30°, cos 60° = sin ... 6 Find sin 120°, cos 120°, and tan 120°.