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german
3 years ago
8

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

Mathematics
1 answer:
scoray [572]3 years ago
6 0
\frac{7 \pi }{6} is in the 3rd quadrant... (It is also 210 degrees)
To find the reference angle (which is the distance to the x-axis)
\frac{7 \pi }{6} - \pi = \frac{ \pi }{6}  (or 30 degrees)

sin \frac{ \pi }{6} = \frac{1}{2}
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