Example 4
Last updated at Dec. 8, 2016 by Teachoo
Transcript
Example 4 The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minutes? (Use ฯ = 3.14). We know that ๐ = r ฮธ Hence, r = minute hand of clock = 1.5 cm Now we know that Minute hand make 1 revolution in 1 hour and Hence we can say that Minute hand complete 360o in one hour So degree complete in 1 minute = 360/60 So degree complete in 40 minute = 360/60 ร 40o = 240o Hence ฮธ = 240o = 240o ร ๐/(180ยฐ) = 4๐/3 Now Putting values in formula ๐ = r ฮธ = 1.5 ร 4๐/3 = 0.5 ร 4๐ = 2๐ = 2 ร 3.14 = 6.28 cm
Examples
Example 1
Example 2
Example 3
Example 4 You are here
Example 5
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
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 8 years. He provides courses for Practical Accounts, Taxation and Efiling at teachoo.com .