Question

Find the value of sin x , if cos x= -1/2

and lies in 2nd

quadrant. ​

Answer 1

$\cos \: x = - \frac{1}{2} \\ = > \cos \: 120 = - \frac{1}{2} \: \: \: \: \: \: \: \\ \\ \\ hance \: sin \: x = \frac{ \sqrt{3} }{2}$

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