Question

Find the value of cos60° cos30°- sin60° sin30°​

Answer 1

Answer:

The value is cos 90°=0

Step-by-step explanation:

cos 60° cos30°- sin 60° sin 30°

This is the the formula of cos (A+B)= cos A cos B-Sin A sin B

here A=60° and B=30°

so,cos (60+30)°=cos 90° = 0