Ex 3.3, 22 - Chapter 3 Class 11 Trigonometric Functions
Last updated at Dec. 24, 2019 by Teachoo
Transcript
Ex 3.3, 22 Prove that cot ๐ฅ cot 2๐ฅ โ cot 2๐ฅ cot 3๐ฅ โ cot 3๐ฅ cot ๐ฅ = 1 Taking L.H.S. cot x cot 2x โ cot 2x cot 3x โ cot 3x cot x = cot x cot 2x โ cot 3x (cot 2x + cot x) = cot x cot 2x โ cot (2x + x) (cot 2x + cot x) = cot x cot 2x โ ((cot 2x cot x โ 1)/(cot x + cot 2x)) (cot 2x + cot x) = cot x cot 2x โ (cot 2x cot x โ 1) = cot x cot 2x โ cot 2x cot x + 1 = 1 = R.H.S. Hence L.H.S = R.H.S Hence proved
Ex 3.3
Ex 3.3, 1
Ex 3.3, 2 Important
Ex 3.3, 3 Important
Ex 3.3, 4
Ex 3.3, 5 Important
Ex 3.3, 6 Important
Ex 3.3, 7
Ex 3.3, 8 Important
Ex 3.3, 9 Important
Ex 3.3, 10
Ex 3.3, 11 Important
Ex 3.3, 12
Ex 3.3, 13
Ex 3.3, 14
Ex 3.3, 15
Ex 3.3, 16
Ex 3.3, 17
Ex 3.3, 18 Important
Ex 3.3, 19
Ex 3.3, 20
Ex 3.3, 21 Important
Ex 3.3, 22 Important You are here
Ex 3.3, 23 Important
Ex 3.3, 24
Ex 3.3, 25
Chapter 3 Class 11 Trigonometric Functions
Serial order wise
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.