A) \[\left( 1-\frac{1}{{{n}^{2}}} \right)\]
B) \[\frac{1}{1-{{n}^{2}}}\]
C) \[\sqrt{\left( 1-\frac{1}{{{n}^{2}}} \right)}\]
D) \[\sqrt{\frac{1}{1-{{n}^{2}}}}\]
Correct Answer: A
Solution :
\[\mu =\tan \theta \left( 1-\frac{1}{{{n}^{2}}} \right)\] \[=1-\frac{1}{{{n}^{2}}}\] [As \[\theta =45{}^\circ \]]
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