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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

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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

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.