1. $\tan \left({\sin }^{-1}\sqrt{1-x^2}\right)=\sin \left({\cos }^{-1}\frac{1}{\sqrt{5}}\right)$

• A. $\pm \frac{\sqrt{5}}{3}$
• B. $\pm \frac{\sqrt{5}}{3}$
• C. $\pm \frac{\sqrt{5}}{3}$
• D. $\pm \frac{\sqrt{5}}{3}$

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