1. Chapter 8 Class 10 Introduction to Trignometry
  2. Concept wise
  3. Trignometric ratios of complementry angles

What is sin (90 - A) cos (90 - A) equal to?

Last updated at May 29, 2018 by

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Trigonometric Ratios of complementary angles are

  1. sin (90° − θ) = cos θ
  2. cos (90° − θ) = sin θ
  3. tan (90° − θ) = cot θ
  4. cot (90° − θ) = tan θ
  5. sec (90° − θ) = cosec θ
  6. cosec (90° − θ) = sec θ
  1. Chapter 8 Class 10 Introduction to Trignometry
  2. Concept wise

    3. Trignometric ratios of complementry angles

    Expressing ratios in other ratios →
Chapter 8 Class 10 Introduction to Trignometry
Concept wise

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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.