Question 1 - Examples - Chapter 3 Class 11 Trigonometric Functions

Last updated at August 5, 2026 by

Example 18 - sin x = root 3, find principal solution - Chapter 3 - Examples

Example 18 - Chapter 3 Class 11 Trigonometric Functions - Part 2

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Example 18 Find the principal solutions of the equation sin x = √3/2 . sin x = √3/2 We know that sin 60° = √3/2 Here sin is positive, sin is positive in Ist and IInd quadrant Value in Ist quadrant = 60° Value in llnd Quadrant = 180 – 60 = 120° So, principal solution are x = 60° and 120° x = 60/180 𝜋 and 120/180 𝜋 x = 𝜋/3 and 2/3 π

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