Question

evaluate cos 60 degree * cos 30 degree - sin 60 degree * sin 30 degree
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Answer 1

Answer:

HOPE THIS WOULD HELP U

I have solved this sum step wise

value of

cos 30 degree = _/3 / 2

cos 60 degree = 1/2

sin 30 degree = 1 / 2

sin 60 degree = _/3 / 2