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If y = sec(tan^-1x), then dy/dx at x = 1 is equal to

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in Limit, continuity and differentiability by (41.5k points)

If y = sec(tan-1x), then dy/dx at x = 1 is equal to

(A) 1/2

(B) 1

(C) √2

(D) 1/√2

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1 Answer

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Answer is (D) 1/√2

We have

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