Question

cos 45 cos 60 -sin 45 sin 60​

Answer 1

Answer:

1-√3/2√2

Step-by-step explanation:

cos45°=1/√2

cos60°=1/2

sin 45°=1/√2

sin60°=√3/2

so as per the question

COS45°. COS60°-SIN45.SIN60

=1/√2.1/2-1/√2.√3/2

=1/2√2-√3/2√2

=1-√3/2√2