Question

cos30°•cos60°- sin30°•sin60°=0​

Answer 1

Answer:

√3/2x1/2 - 1/2x√3/2

(since cos 30°= √3/2,cos60°=1/2, sin 30°=1/2,sin 60°=√3/2)

√3/4-√3/4

=0

Answer 2

I hope helped of question