A) \[\frac{1}{\sqrt{1-{{\tan }^{2}}\theta }}\]
B) \[\frac{1}{\sqrt{1+{{\tan }^{2}}\theta }}\]
C) \[\frac{\sqrt{1-{{\tan }^{2}}\theta }}{\sqrt{1+{{\tan }^{2}}\theta }}\]
D) \[\frac{1}{\sqrt{3-3{{\tan }^{2}}\theta }}\]
E) None of these
Correct Answer: B
Solution :
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