Continuity and DifferentiabilityHard

Question

cot^-1 is equal to , if x > -1

Options

A.

B.

C.

D.None of these

Solution

y = cot^-1
Put x = tan θ
y = cot^-1
y = cot^-1
y = cot^-1
y = - θ = - tan^-1 x

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