Question

1) A 16 meters long ladder is resting at wall of a house, it distends an angle of 45 degree at certain point on the ground. What is the height of the wall​

Answer 1

Step-by-step explanation:

Given:

Distance between the foot of the tower and point of observation = 20 m = BC

Angle of elevation of the top of the tower = 60° = θ

And, Height of tower (H) = AB

Now, from fig. ABC

ΔABC is a right angle triangle,

So,

R D Sharma Solutions For Class 10 Maths Chapter 12 Some Applications of Trigonometry ex 12.1 - 2

Answer 2

Step-by-step explanation:

let, in triangle abc

ac=16cm, 'ab' be the height of triangle .

now,

ab/ac =45°

ab/16=sin45°

ab/16=1/√2

ab=8√2