Ex 7.3, 11 - Integrate cos4 2x - Chapter 7 CBSE NCERT - Integration using trigo identities - 2x formulae

Ex 7.3, 11 - Chapter 7 Class 12 Integrals - Part 2
Ex 7.3, 11 - Chapter 7 Class 12 Integrals - Part 3

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Transcript

Ex 7.3, 11 cos 4 2 cos 4 2 = cos 2 2 2 = 1 + cos 4 2 2 = 1 4 1+ cos 4 2 = 1 4 1 2 + cos 4 2 +2 cos 4 1 = 1 4 1+ cos 2 4 +2 cos 4 = 1 4 1+ cos 8 + 1 2 +2 cos 4 = 1 4 1 + 1 2 cos 8 +1 +2 cos 4 = 1 4 1 + 1 2 cos 8 + 1 2 1 +2 cos 4 = 1 4 + 1 2 sin 8 8 + 1 2 +2 sin 4 4 + = 1 4 + 1 2 + 1 16 sin 8 + 1 2 sin 4 + = 1 4 3 2 + 1 16 sin 8 + 1 2 sin 4 + = + + +

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.