You are looking at a billboard 40m away with an angle of elevation of 30°. At what height is the billboard?
সমাধান
সঠিক উত্তর: Option A
Let, the height of the billboard is x
we know, sinΘ = height/hypotenuse
⇒ sin30 = x/40
⇒ 1/2 = x/40
x = 20
