At a point on a level plane a tower subtends an angle θ and a flag-staff a ft. in length at the top of the tower subtends an angle ϕ. The height of the tower is:

Question

At a point on a level plane a tower subtends an angle θ and a flag-staff a ft. in length at the top   of the tower subtends an angle ϕ. The height of the tower is:

Examsnet · Accepted Answer

Correct Answer is : a‌sin‌θ‌cos(θ+ϕ)sin‌ϕ

Heights and Distances Practice Test 2