Height and Distance - Shortcuts & Tricks for Placement Tests, Job Interviews & Exams | Trigonometry

Описание: Crack the quantitative aptitude section of Placement Test or Job Interview at any company with shortcuts & tricks on Height & Distance chapter where you apply Trigonometry in real life. Extremely helpful to crack entrance exams like MBA, Banking – IBPS, SBI, UPSC, SSC, Railways etc.

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0:00 Introduction
0:46 Angle of Elevation & Depression
7:26 Remembering Values
9:45 The angle of elevation of the top of a tree from a certain point
15:15 Tree top's angle of elevation is 30° from a point on ground, 300 m away from the tree. When the tree grew up its angle of elevation became 60 from the same point. How much did the tree grow?
20:18 There is a tower of 10m between two parallel roads. The angles of depression of the roads from the top of the tower are 30 and 45°. How far are the roads from each other?
24:21 Ramesh and Suresh's mud forts have heights 8cm and 15 cm. They are 24 cm apart. How far are the fort tops from each other?
26:39 Guddi was standing on a road near a mall. She was 1000m away from the mall and able to see the top of the mall from the road in such a way that top of the tree, which is in between her and the mall, was exactly in line of sight with the top of the mall. The tree height is 10m and it is 20m away from Guddi. How tall is the mall?
29:43 A light house is built to give directions to the sailing ships. It observes that a ship is sailing towards it in a straight line, at a uniform speed. It also notices the angle of depression to change from 30 degree to 45 degrees in 15 minutes. How soon will the ship reach the lighthouse? (Assume the water to be still) EASY
33:52 Ram stands on the top of a building and observes a car going away from the building. When the car is 60 m from building, angle of depression is 45 degree. After 5 seconds, it is 30 degree. What is the speed of the car?
39:00 28. Angles of elevation of pole are 60° and 45° from points at distances m and non ground respectively. Here m, when measured from base of pole is less than n. What is the height of the pole?