Here you get the NCERT Exemplar Problems and Solutions (Part-IVA) for CBSE Class 10 Maths chapter 8, Introduction to Trigonometry and its Applications. This part brings you the solutions to Q. No. 6-12 of exercise 8.4 of NCERT Exemplar for Mathematics chapter 8. Check out these solution for stepwise clear and easy explanation.
Find below the NCERT Exemplar problems and their solutions for Class 10 Mathematics Chapter, Introduction to Trigonometry and its Applications:
Exercise 8.4
Long Answer Type Questions (Q. No. 7-12)
Question. 7 The shadow of a tower standing on a level plane is found to be 50m longer when Sun's elevation is 30° than when it is 60°. Find the height of the tower.
Solution:
Let AC be the tower of height h and 60° and 30° be its angles of elevation at distances x m and (x + 50) m, respectively as shown below.
Question. 8 A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane the angles of elevation of the bottom and the top of the flag staff are α and β, respectively. Prove
Hence Proved.
Question. 10 If sinθ + cosθ = p and secθ + cosecθ = q, then prove that q(p2 -l) = 2p.
Solution:
