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Ex 3.3, 17 - Chapter 3 Class 11 Trigonometric Functions
Last updated at May 29, 2023 by Teachoo
Cos x + cos y formula
Sum Identities (Sum to Product Identities)
Ex 3.3, 11 Important
Misc 3
Misc 4 Important
Ex 3.3, 14
Ex 3.3, 15
Misc 5
Misc 7 Important
Example 16 Important
Ex 3.3, 16 Important
Ex 3.3, 17 You are here
Ex 3.3, 18 Important
Ex 3.3, 19
Ex 3.3, 20
Ex 3.3, 21 Important
Example 17 Important
Misc 6 Important
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
Transcript
Ex3.3, 17 Prove that 5 + 3 / 5 + 3 = tan 4x Taking L.H.S. 5 + 3 / 5 + 3 We solve sin 5x + sin 3x & cos 5x + cos 3x seperately Now 5 + 3 / 5 + 3 = (2 4x )/(2 4 ) = 4x /cos 4x = tan 4x = R.H.S Hence L.H.S = R.H.S Hence proved
