SOLUTION: Find the exact value of the following. cos60°cos15° + sin60°sin15°

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Question 1106058: Find the exact value of the following.
cos60°cos15° + sin60°sin15°
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
this is cos (a-b), where a=60 degrees and b=15 degrees
this is cos 45= sqrt(2)/2