Question

find the value of cos 45 cos 60 sin 45 sin 60​

Answer 1

Answer:

Cos 45= 1/√2

Cos 60 =1/2

Sin 45 = 1/√2

Sin 60 = √3/2

Answer 2

Step-by-step explanation:

cos(90-45) cos(90-30) sin 45 sin 60

=sin45 sin30 sin45 sin60

=sin^2 45 sin 30 sin 60

=(1/√2)^2x1/2 x √3/2

=√3/8