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.
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)
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.
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...