Discussion
If the length of the shadow of a tower is increasing, then the angle of elevation of the sun is:
Answer: B
Let h be the height of the tower and s be the length of the shadow. The angle of elevation θ is given by \(\tan \theta = h/s\).
Since the height h is constant, if the shadow length 's' increases, the value of the fraction h/s decreases.
As \(\tan \theta\) decreases, the angle θ also decreases (for acute angles). Therefore, the angle of elevation is decreasing.
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