NCERT Mathematics class X SOme Application of trigonometry
SOME APPLICATIONS OF TRIGONOMETRY What is the angle of elevation? When a person sees an object that lies at a height above the ground, the angle between the horizontal level and the line joining the object from the observer is called the angle of elevation. Click here to access the special offer! Click here to access the special offer! What is the angle of depression? When an observer sees an object lying on the ground from a height, then the angle between the horizontal line (from the observer's eye level) and the line joining the object and the eye is said to be the angle of depression. In the above figure, the first figure is the angle of elevation, and the second figure is the angle of depression. Simple rules for calculation Unknown value/Known value = Trigonometric ratio Solution of Question 1 A circus artist is climbing a 20 m long rope, which is tightly stretched and tied from the top of a vertical pole to the ground. Find the height of t...