Ncert solutions for class 10 maths chapter 9 






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Determine the angle of elevation of the top of the tower from the eye of the observer. For this, the point D lies on the circum circle. Page No: 159 Exercise 9.
What does each piece represent? Answer Let A, B and C represent the positions of Ankur, Syed and David respectively. From another point 20 m away from this point on the line joining this point to the foot of the tower, the angle of elevation of the top of the tower is 30° see Fig. Six seconds later, the angle of depression of the car is found to be 60°.
The Gram Panchayat of the village decided to take over some portion of his plot from one of the corners to construct a Health Centre. The topics and sub-topics in Chapter 10 Circles are given below. Other than given exercises, you should also practice all the solved examples given in the book to clear your concepts on Circles. Three girls Reshma, Salma and Mandip are playing a game by standing on a circle of radius 5m drawn in a park. From a point on the other bank directly opposite the tower, the angle of elevation of the top of the tower is 60°. The inclination of the string with the ground is 60°. Trigonometry is also used in geography and in navigation. C is the original position of the car which changes to D after six seconds. If the car are 100 m apart, find the height of the balloon.
NCERT Solutions for class 10 Maths Chapter 9 Exercise 9.1 Trigonometry - As the height can not be negative, the height of the tower is 6 m. As observed from the top of a 75 m high lighthouse from the sea-level, the angles of depression of two ships are 30° and 45°.
These solutions for Some Applications Of Trigonometry are extremely popular among class 10 students for Math Some Applications Of Trigonometry Solutions come handy for quickly completing your homework and preparing for exams. Question 3: A contractor plans to install two slides for the children to play in a park. For the children below the age of 5 years, she prefers to have a slide whose top ncert solutions for class 10 maths chapter 9 at a height of 1. What should be the length of the slide in each case. Question 10: Two poles of equal heights are standing opposite each other an either side of the road, which is 80 m wide. From a point between them on the road, the angles of elevation of the top of the poles are 60° and 30º, respectively. Find the height of poles and the distance of the point from the poles. From a point on the other bank directly opposite the tower the angle of elevation of the top of the tower is 60°. From another point 20 m away from this point on the line joining this point to the foot of the tower, the angle of elevation of the top of the tower is 30°. Find the height of the tower and the width of the canal. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°. After some time, the angle of elevation reduces to 30°. Find the distance travelled by the balloon during the interval. Question 15: A straight highway leads to the foot of a tower. A man standing at the top of the tower observes a car as an angle of depression of 30°, which is approaching the foot of the tower with a uniform speed. Six seconds later, the angle of depression of the car is found to be 60°. Find the time taken by the car to reach the foot of the tower from this point. Therefore, the height of the tower is 6 m.