SOLUTION: The value of cos 3pi, where 3pi is radian measure , is

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Question 180120: The value of cos 3pi, where 3pi is radian measure , is
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
cos%283pi%29=cos%28pi%29=-1


Note: The angle 3pi radians is a coterminal angle to the pi radians. Also, use the unit circle if you aren't familiar with trig functions.