Check sibling questions

Ex 3.3, 17 - Prove sin 5x + sin 3x / cos 5x + cos 3x = tan 4x - cos x + cos y formula

Ex 3.3, 17 - Chapter 3 Class 11 Trigonometric Functions - Part 2

This video is only available for Teachoo black users

Introducing your new favourite teacher - Teachoo Black, at only โ‚น83 per month


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

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.