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Last updated at May 29, 2018 by Teachoo

Transcript

Example 18 Find the principal solutions of the equation sin x = √3/2 . sin x = √3/2 We know that sin 60° = √3/2 Here sin is positive, sin is positive in Ist and IInd quadrant Value in Ist quadrant = 60° Value in llnd Quadrant = 180 – 60 = 120° So, principal solution are x = 60° and 120° x = 60/180 𝜋 and 120/180 𝜋 x = 𝜋/3 and 2/3 π

Chapter 3 Class 11 Trigonometric Functions

Concept wise

- Radian measure - Conversion
- Arc length
- Finding Value of trignometric functions, given other functions
- Finding Value of trignometric functions, given angle
- (x + y) formula
- 2x 3x formula - Proving
- 2x 3x formula - Finding value
- cos x + cos y formula
- 2 sin x sin y formula
- Finding Principal solutions
- Finding General Solutions
- Sine and Cosine Formula

About the Author

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.