Learn All Concepts of Chapter 2 Class 11 Relations and Function - FREE. Check - Trigonometry Class 11 - All Concepts


Last updated at Feb. 12, 2020 by Teachoo
Learn All Concepts of Chapter 2 Class 11 Relations and Function - FREE. Check - Trigonometry Class 11 - All Concepts
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 Here, r = minute hand of clock = 1.5 cm Finding Angle ๐ Now we know that Minute hand make 1 revolution in 1 hour Hence we can say that, Minute hand completes 360ยฐ in one hour In ๐ = ๐/๐ , ฮธ is in radians So, Degree completed in 1 minute = 360/60 Degree completed in 40 minute = 360/60 ร 40ยฐ = 240ยฐ Hence ฮธ = 240ยฐ = 240ยฐ ร ๐/(180ยฐ) = 4๐/3 Now Putting values in formula ๐ = r ฮธ (Radian measure = ๐/180 ร Degree measure ) = 1.5 ร 4๐/3 = 0.5 ร 4๐ = 2๐ = 2 ร 3.14 = 6.28 cm
Examples
Example 2
Example 3
Example 4 You are here
Example 5 Important
Example 6 Important
Example 7 Important
Example 8
Example 9 Important
Example 10
Example 11 Important
Example 12
Example 13
Example 14
Example 15
Example 16 Important
Example 17 Important
Example 18
Example 19 Important
Example 20 Not in Syllabus - CBSE Exams 2021
Example 21 Not in Syllabus - CBSE Exams 2021
Example 22 Important Not in Syllabus - CBSE Exams 2021
Example 23 Not in Syllabus - CBSE Exams 2021
Example 24 Important Not in Syllabus - CBSE Exams 2021
Example 25 Important
Example 26 Important
Example 27 Important
Example 28 Important
Example 29 Important
About the Author