A) \[{{\tan }^{-1}}\left( \frac{1}{{{\mu }^{2}}-1} \right)\]
B) \[{{\tan }^{-1}}({{\mu }^{2}}-1)\]
C) \[{{\tan }^{-1}}\sqrt{{{\mu }^{2}}-1}\]
D) \[{{\tan }^{-1}}\left( \frac{1}{\sqrt{{{\mu }^{2}}-1}} \right)\]
Correct Answer: D
Solution :
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