Last updated at Dec. 8, 2016 by Teachoo

Transcript

Example 21 Solve cos x = 1/2 Let cos x = cos y Given cos x = 1/2 From (1) and (2) cos y = 1/2 cos y = cos ๐/3 y = ๐/3 Step 2 Since cos x = cos y General Solution is x = 2nฯ ยฑ y where n โ Z Putting y = ๐/3 x = 2ฯ ยฑ ๐/3 where n โ Z

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Example 21 You are here

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Chapter 3 Class 11 Trigonometric Functions

Serial order wise

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.