Last updated at May 29, 2018 by Teachoo

Transcript

Example, 5 If the arcs of the same lengths in two circles subtend angles 65Β°and 110Β° at the center, find the ratio of their radii. We know that π = r ΞΈ There are 2 circle of different radius So the radius be denoted by r1 and r2 Length of arc of Ist circle π = r1 ΞΈ = r1 Γ 65o = r1 Γ 65o Γ π/(180Β°) = r1 Γ (13 π)/36 It is give that Arcs are of same length Hence Length of I arc = length of II arc r1 Γ (13 π)/36 = r2 Γ (11 π)/18 π1/π2 = (11 π)/18 Γ 36/13π π1/π2 = 22π/13π π1/π2 = 22/13 Hence r1 : r2 = 22 : 13 So Ratio of Radius = 22 : 13

Examples

Example 1

Example 2

Example 3

Example 4

Example 5 You are here

Example 6

Example 7

Example 8

Example 9

Example 10

Example 11

Example 12

Example 13

Example 14

Example 15

Example 16

Example 17

Example 18

Example 19

Example 20

Example 21

Example 22

Example 23

Example 24 Important

Example 25

Example 26

Example 27 Important

Example 28 Important

Example 29

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.