Maths Diya
Storyboard-Text
- Students as we have only 10 minutes left..I will quickly teach you guys ,how to calculate height and distance.
- To, calculate heights and distances, we can make use of trigonometric ratios.
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- Step 1: Draw a line diagram corresponding to the problem.Step 2: Mark all known heights, distances and angles and denote unknown lengths by variables.Step 3: Use the values of various trigonometric ratios of the angles to obtain the unknown lengths from the known lengths.
- The teacher continues teaching...
- From a point 20m away from a tower's foot, the angle of elevation pf its top is 30°.Find the height of tower.(Take √3 = 1.732)
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- 20m
- 30°
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- B
- Teacher explaining the use of trigonometric ratios.
- Let AB be the height of the tower and C be the point .In rt.△ABC,tan30° = AB/BCAB = BC tan30°= 20/√3 = 20/√3 × √3/√3 = 11.56 mTherefore the height of the tower is 11.56 m.
- Yes mam..
- Then she teaches 3 steps to understand the concept in an easy way...
- Let AB be the height of the tower and C be the point .In rt.△ABC,tan30° = AB/BCAB = BC tan30°
- Thank you mam!
- The teacher finishes the session with an example..
- Do take this down in your cw children!!
- Teacher making sure that students understood the topic...
- Did you all understand??
- Times up and the students leave for a break!!
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