SOLUTION: is cos3pi positive negative or zero
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Question 1161749: is cos3pi positive negative or zero
Found 2 solutions by MathLover1, greenestamps:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
->negative
Answer by greenestamps(13203) (Show Source): You can put this solution on YOUR website!
3pi is coterminal with 3pi-2pi = pi
pi radians is a half circle; on the unit circle you are at (-1,0).
Cosine is the x value, which is -1.
ANSWER: negative
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