Скачать или смотреть ClassX|Maths|NCERT|Chapter9|Some Applications of Trigonometry|Word Problems|By PreejaAjith

Topics explained:-
Angle of elevation and Angle of depression
Explained qns:
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 the pole if the angle made by the rope with the ground level is 30⁰.
2)A tree breaks due to storm and the broken part bends so that the top of the tree touches the ground making an angle 30 ° with it. The distance between the foot of the tree to the point where the top touches the ground is 8 m. Find the height of the tree.
3)A 1.5 m tall boy is standing at some distance from a 30 m tall building.The angle of elevation from his eyes to the top of the building increases from 30° to 60° as he waljs towatds the building.Find the distance he walked towards the building
4)From a point on the ground the angle of elevation of the bottom and top of the transmission tower fixed at the top of 20 meters high tower are 45 degrees and 60 degrees. find the heigt of the tower with diagram