Some Applications of trigonometry:
The chapter 'Some applications of trigonometry' carrying weightage of 5-6 marks in the board examination. It covers the concepts like angle of elevation, angle of depressions to measure the heights and distances.
Most possible variation of question types that we can expect in board exam as per previous year question paper are discussed below:
| Total Marks 5-6 | |
| Variation 1 | Variation 2 |
Total marks = 5
|
Total marks = 6
|
To prepare well for the board examination, it is necessary to understand the following concepts clearly.
- Angle of elevation
- Angle of depression
| Important Concept(Learning Outcomes) | Expected Question Type | Concept dealt with |
| Angle of elevation - Finding anlges or side length | Sec A, Sec B | |
| Angle of elevation and depression | Sec D, Sec E |
Let us recall the concepts in applications of trigonometry:
Line of sight: The line of sight is the line drawn from the eye of an observer to the point in the object viewed by the observer.
Angle of elevation: The angle of elevation of an object viewed, is the angle formed by the line of sight with the horizontal when it is above the horizontal level.
Angle of depression: The angle of depression of an object viewed, is the angle formed by the line of sight with the horizontal when it is below the horizontal level.
