Answer :

Let h be the height of the tower

tan 30°= h/ AB (tan θ = perpendicular / base)


When the height is tripled h becomes 3h

tan θ = 3h / AB

tan θ = (from 1)

tan θ =

tan θ = √3 ( by rationalizing the denominator)

θ = 60° (tan 60° = √3)

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