Question 4 - Finding General Solutions - Chapter 3 Class 11 Trigonometric Functions

Last updated at Dec. 16, 2024 by

Example 21 - Solve cos x = 1/2 - Trigonometric Functions CBSE

Example 21 - Chapter 3 Class 11 Trigonometric Functions - Part 2

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Question 4 Solve cos đ‘Ĩ = 1/2 Let cos x = cos y Given cos x = 1/2 From (1) and (2) cos y = 1/2 cos y = cos 𝜋/3 y = 𝜋/3 Rough We know that cos 60° = 1/2 So, 60° = 60 × Ī€/180 = Ī€/3 Since cos x = cos y General Solution is x = 2nĪ€ Âą y where n ∈ Z Putting y = 𝜋/3 x = 2nĪ€ ±𝝅/𝟑 where n ∈ Z

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo