Question
A 18 m long ladder (whose foot is on the ground) leans
against a wall making an angle of 60° with the wall. What is the height (in m) of the point where the ladder touches the wall from the ground?Solution
In ΔABC ∠C = 180∘ − 30∘ − 90∘ ∠C = 60° Now, sin 60∘ = AB/AC √3/2 = AB/18 ⇒ AB = 9√3
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