Question

The measure of angle θ 7pi/6 is . The measure of its reference angle is °, and sin θ is

Answer 1

The reference angle is closest to the x-axis.
I will assume the above is 7pi/6. That would be a reference angle of pi/6, and the sin in the 3rd quadrant is negative, so the sin theta = - 0.5

Answer 2

the correct answer for plato is

The measure of its reference angle is 30 °, and sin θ is -1/2

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Explanation: