A) \[\text{cosec}({{\sec }^{-1}}x)\]
B) \[\cot x\]
C) \[\pi \]
D) None of these
Correct Answer: A
Solution :
We know that sec (cosec-1x) = cosec(sec-1 x) \[=\frac{|x|}{\sqrt{{{x}^{2}}-1}}\]for\[|x|\,>\,1\].
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