For general solutions

We must learn

 

For sin x = sin y,

  x = nπ + (–1) n y, where n ∈ Z

 

For cos x = cos y ,

  x = 2nπ ± y, where n ∈ Z

 

For tan x = tan y,

  x = nπ + y, where n ∈ Z

 

Note : Here n ∈ Z   means n is an integer

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  1. Chapter 3 Class 11 Trigonometric Functions
  2. Concept wise
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Transcript

For general solutions We must learn For sin x = sin y,   x = nπ + (–1)n y, where n ∈ Z For cos x = cos y,   x = 2nπ ± y, where n ∈ Z For tan x = tan y,   x = nπ + y, where n ∈ Z Note: Here n ∈ Z  means n is an integer

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 7 years. He provides courses for Mathematics and Science from Class 6 to 12. You can learn personally from here https://www.teachoo.com/premium/maths-and-science-classes/.
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