1. Chapter 8 Class 10 Introduction to Trignometry
  2. Serial order wise
  3. Ex 8.3

Ex 8.3, 5 - Chapter 8 Class 10 Introduction to Trignometry

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Learn all Concepts of Chapter 8 Class 10 (with VIDEOS). Check - Trigonometry - Class 10

Ex 8.3, 5 - If sec 4A = cosec (A - 20), find value of A. - Ex 8.3

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

    3. Ex 8.3

    Ex 8.4 →

Transcript

Ex 8.3 ,5 If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A. sec 4A = cosec (A – 20°) cosec (90 – 4A) = cosec (A – 20°) Comparing angles 90 – 4A = A – 20 – 4A – A = – 20 – 90 – 5A = –110 A = (− 110)/(− 5) A = 22°

Chapter 8 Class 10 Introduction to Trignometry
Serial order wise

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