If z = sec –1 +sec –1 , where xy> 0, then the value of z …

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

Published by: CGP EDU Academic Team

Published on: August 13, 2026

If z = sec –1 +sec –1 , where xy> 0, then the value of z (among the given values) is not possible-

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The correct answer is:

xy > 0 ⇒ x & y are of same sign

x + ≥ 2 or ≤ – 2

sec –1 ∈ ∪

∴ z ∈ ∪

Hence, value of z (among the given) which does not lie in the

set is .

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