If tan –1 + tan –1 = tan –1 (–7) + π then 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

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The correct answer is:

Take tan on both sides

= – 7

⇒ x 2 – 4x + 4 = 0

⇒ x = 2

check L.H.S = tan –1 3 + tan –1 2 ∈ (0, π )

R.H.S. ∈ (0, π )

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