[Kurukshetra CEE 2001]
A) $ cosec({{\sec }^{-1}}x) $
B) $ \cot x $
C) $ \pi $
D) None of these
Correct Answer: A
We know that sec (cosec-1x) = cosec(sec-1 x) $ =\frac{|x|}{\sqrt{x^{2}-1}} $ for $ |x|>1 $ .
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