Find sinx2,cosx2 and tanx2 for cosx=−13,x in quadrant III.

1.	Find sinx2,cosx2 and tanx2 for cosx=−13,x in quadrant III.
Answer» Find $sin \frac{x}{2}, cos \frac{x}{2}$ and $tan \frac{x}{2}$ for $cos x = - \frac{1}{3}, x$ in quadrant $I I I .$

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