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Mr. Math,
Could you tell me what is the sin of 120 degree?
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Well, with the sin of 120 degrees, we are in the second quadrant. The sin of 120 is the same as the sin of 60 degrees but in the second quadrant. Since we are in the second quadrant, sin is positive in this quadrant so the value is positive. The sin of 120 degrees is equal to the square root of 3 divided by 2.
Performed by an instructor of InteractiveMathTutor.com
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