Considering the unit circle, it is found that the sine is negative on the third and on the fourth quadrant.
What is the unit circle?
For an angle [tex]\theta[/tex] the unit circle is a circle with radius 1 containing the following set of points: [tex](\cos{\theta}, \sin{\theta})[/tex].
Hence, from the above explanation, the sine is negative when y is negativem, which is on the third and on the fourth quadrant.
More can be learned about the unit circle at https://brainly.com/question/16852127
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