Question

Cos 65 cos 25 - sin65 sin 25

Answer 1

Answer:

Cos 65° Cos 25° - Sin 65° Sin 25°

= Cos 65° Sin(90° - 25°) - Sin 65° Cos(90°- 25°)

= Cos 65° Sin 65° - Sin 65° Cos 65°

= 0

I hope this will help u. Please add this to brainlist.