Ex 2.1, 2 - Chapter 2 Class 12 Inverse Trigonometric Functions

Last updated at July 21, 2026 by

Ex 2.1, 2 - Find principal value of cos-1 (root 3/2) - Class 12

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Ex 2.1, 2 Find the principal value of cos-1 (√3/2) Let y = cos-1 √3/2 cos y = √3/2 cos y = cos 𝝅/𝟔 ∴ y = 𝝅/𝟔 Since Range of cos-1 is [0, 𝜋] Hence, Principal Value is 𝝅/𝟔 (Since cos 𝜋/6 = √3/2)

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