SOLUTION: find the exact values of cos8 degrees cos 38 degrees +sin 8 degrees + sin 38 degrees

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Question 30136: find the exact values of cos8 degrees cos 38 degrees +sin 8 degrees + sin 38 degrees
Answer by sdmmadam@yahoo.com(530) About Me  (Show Source):
You can put this solution on YOUR website!
The problem should be
cos8 degrees cos 38 degrees +sin 8 degrees sin 38 degrees
That is (cos38 cos8 + sin 38 sin8) where the angles are in degrees
=[cosAcosB +sinAsinB] where A = 38 deg and B = 8 deg
=cos(A-B)
=cos(38-8)
=cos(30 deg)
=[(sqrt(3)]/2