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Help me with this question pleaseeee!!!

Help me with this question pleaseeee!!!-example-1
User Gerky
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we have that
the measure of angle ∅=7*pi/6
the measure of its reference angle is?
remember that pi=180°
then
7*pi/6=7*180/6=210°------------> III Quadrant
Part A) its reference angle is 210°-180°=30°
Part B) sin(30°)=-0.5--------> negative because belongs III quadrant

User Talha Sayed
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