Question

EXERCISE 9.1
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
la 3 (see Fig. 9.11).​

Answer 1

Answer:

Sin 30 = AB/AC

$\sin(30) = \frac{ab}{20} \\ \frac{1}{2} = \frac{ab}{20} \\ 20 = 2ab \\ 10m = ab$

So height of pole is 10 m