# Maths Diya

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• ﻿﻿﻿﻿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.﻿﻿﻿﻿﻿﻿﻿
• ﻿﻿﻿﻿﻿90 ﻿﻿﻿
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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)
• ﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿C
• ﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿20m
• ﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿30°
• ﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿A
• ﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿﻿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!!