1. Chapter 8 Class 10 Introduction to Trignometry
  2. Serial order wise
  3. Examples

Example 8 - Chapter 8 Class 10 Introduction to Trignometry

Last updated at Dec. 8, 2016 by

Example 8 - If sin (A - B) = 1/2, cos (A + B) = 1/2, find A - Examples

  1. Chapter 8 Class 10 Introduction to Trignometry
  2. Serial order wise

    3. Examples

    Finding sin cos tan →

Transcript

Example 8 If sin (A – B) = 1/2 , cos (A + B) = 1/2 , 0° ∠ A + ∠ B ≤ 90° , A > B, find A and B. Given data, Our equations are A − B = 30° …(1) A + B = 60° …(2) Adding (1) and (2) A – B + A + B = 60° + 30° 2A = 90° A = (90°)/2 A = 45° Putting A = "45°" in (2) A + B = 60° 45° + B = 60° B = 60° − 45° B = 15° Hence A = 45° , B = 15°

Chapter 8 Class 10 Introduction to Trignometry
Serial order wise

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.