Heights and Distances
Heights here refers to the distance above the ground, and the distances are most probably the horizontal distances from the observer, to the building. Before starting our discussion on the questions part, we need to go through some new concepts used while solving questions.
Line of Sight
As, per the name, it is a straight line, which starts from your eye position, and ends at a target position. For example, a girl is standing in front of a building, and want to view the topmost point, of the building, then, the line joining her eye, and the top of the tower, is the line of sight.
Angle of Elevation
The angle of elevation is the angle between the line of sight, and the horizontal line passing through the eye position of the observer, and, the line of sight is always, above the horizontal one. For example, for plucking mangoes by throwing stones, requires a certain angle from the ground, which in turn is the angle of elevation, where line of sight, is the line passing your eye, and the mango.
Angle of Depression
The angle of depression is the angle between the line of sight, and the horizontal line passing through the eye position of the observer, and, the line of sight is always, below the horizontal one. For example, looking at the road, from a multi-story building.
Some Applications of Trigonometry Class 10 Maths Notes Chapter 9
CBSE Class 10 Maths Notes Chapter 9 Applications of Trigonometry are an excellent resource, for knowing all the concepts of a particular chapter in a crisp, and friendly manner. Our articles, help students learn in their language, with proper images, and solved examples for better understanding the concepts.
Chapter 9 of the NCERT Class 10 Maths textbook delves into the world of Applications of Trigonometry used in real life and covers various topics such as understanding the angle of elevation, angle of depression, and line of sight. These notes are designed to provide students with a comprehensive summary of the entire chapter and include all the essential topics, formulae, and concepts needed to succeed in their exams.