What is the derivative of tan-1 x with respect to cot-1 x ? – McqOptions

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1.	What is the derivative of tan-1 x with respect to cot-1 x ?
A.	-1
B.	1
C.	\(\rm \dfrac{1}{x^2+1}\)
D.	\(\rm \dfrac{x}{x^2+1}\)
Answer» B. 1

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