If a 26 m ladder is placed against a 13 m wall such that it just reaches the top of the wall. What will be the elevation of the wall?

Question: If a 26 m ladder is placed against a 13 m wall such that it just reaches the top of the wall. What will be the elevation of the wall?Solution:AC = 26 metersAB = 13 meters∠ACB = θ∴ sinθ = AB/AC⇒ sinθ =13/26⇒ sinθ =1/2⇒ sinθ = sin30∘⇒ θ = 30∘