SOLUTION: cos(pi/10) = cos (-pi/10) How do i show this to be true. Explain

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Question 665901: cos(pi/10) = cos (-pi/10) How do i show this to be true. Explain
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
cos(pi/10) = cos (-pi/10) How do i show this to be true. Explain
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Use the unit circle, or plot the terminal points on the x-y plane.