SOLUTION: is sin((2pi)/3) positive negative or zero

Question 1161750: is sin((2pi)/3) positive negative or zero
Found 2 solutions by MathLover1, greenestamps:
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

=> so, positive
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

2pi/3 is just short of pi; better said, it is greater than pi/2 and less than pi.

So you are in quadrant II, where x is negative an y is positive.

Sine is the y value, so sin(2pi/3) is positive.

ANSWER: positive

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