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Question
Differentiate tan-1 (cot 2x) w.r.t.x.
Solution
Let y = tan-1 (cot 2x)
y = tan-1 `[tan(π/2 - 2x)]`
y = `π/2 - 2x`
Differentiating both sides w.r.tx we get
`(dy)/(dx) = -2`
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