A is standing at a point 15 metres away from the base of B’s house which is 15 metres high. What is the angle of elevations of the top?

A. 90°
B. 60°
C. 30°
D. 45°



Sol: Let BC denotes the height of the house.
Let Q be the angle of elevation
therefore, tanQ = BC / AC
                       = 15 m / 15m
                     =  1
tanQ    =  1
Q        = 450
        
Hence option D is the correct answer.

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