SOLUTION: Find cos(15pi/4)

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Question 840332: Find cos(15pi/4)
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Find cos(15pi/4)
15π/4=3π+3π/4
This equals to a reference angle of π/4 in quadrant IV in which cos>0
cos(15π/4)=cos(π/4)=√2/2