Which ordered pair is on the unit circle at 150 degrees? \left(-\frac{\sqrt{2}}{2},\:-\frac{ \sqrt{2}}{2}\right)( − 2 2 , − 2 2 ) \left(-\frac{\sqrt{2}}{2},\:\frac{\ sqrt{2}}{2}\right)( − 2 2 , 2 2 ) \left(-\frac{\sqrt{3}}{2},\:-\frac{ 1}{2}\right)( − 3 2 , − 1 2 ) \left(-\frac{\sqrt{3}}{2},\frac{1}{ 2}\right)