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) About Me  (Show Source):
Answer by greenestamps(13200) About Me  (Show Source):
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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