Question

Evaluate cos 48 cos 42° - sin 48° sin 42​

Answer 1

Answer:

The answer 0

For Step by Step explanation refer to the picture.

Answer 2

Answer:

=cos 48 sin (90-42) - sin 48 cos (90-42)

= cos 48 sin 48 - sin 48 cos 48

= cos 48 1/cos 48- sin 48 1/ sin 48

= 1-1

= 0

I hope it will help you.....