The correct answer is B. Let θ = tan –1 x ⇒ x = tan θ ∴ cos θ = 1/ = 1/ = cos (tan –1 x)

cos (tan –1 x) =

Maths Inverse Trigonometric Functions Inverse Trigonometric Functions, Inverse Trigo Identities Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

cos (tan –1 x) =

1 + x 2

None of these

Text Solution

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The correct answer is:

Let θ = tan –1 x ⇒ x = tan θ

∴ cos θ = 1/ = 1/ = cos (tan –1 x)

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