Some Applications of Trigono

**Category : **10th Class

**Some Applications of Trigonometry**

**Line of sight:**The imaginary line drawn from the eye of the observer to the object, when the observer is looking at it is called the line of sight,

**Note: **Line of sight is called the line of vision.

**Angle of elevation:**The angle formed by the line of sight with the horizontal when the object is above the horizontal level is called the angle of elevation,

**Note:** When the observer looks at an object raising his, head an angle of elevation is formed.

- Angle of depression: The angle formed by the line of sight with the horizontal when the object is below the horizontal level is called the angle of depression.

**Note:** When the observer looks at an object lowering his head, an angle of depression is formed.

- The height or length of an object or the distance between two distant objects can be determined with the help of trigonometric ratios.

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