SOLUTION: Why does cos(85 degrees)+cos(95 degrees)= 0?
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Question 566833: Why does cos(85 degrees)+cos(95 degrees)= 0?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
because \ =\ -\cos\left(85^\circ\right))
Look at the unit circle, recall that the cosine function is the 
coordinate, and note that 85 degrees is 5 degrees ahead of 90 and 95 degrees is 5 degrees past 90.
John
My calculator said it, I believe it, that settles it
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