A) \[\frac{1}{\sqrt{1-{{x}^{2}}}}\]
B) \[-\frac{1}{\sqrt{1-{{x}^{2}}}}\]
C) \[\frac{1}{\sqrt{1+{{x}^{2}}}}\]
D) \[\frac{-1}{\sqrt{1+{{x}^{2}}}}\]
Correct Answer: A
Solution :
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