# If the length of the shadow of a tower is increasing, then find the changes in the angle of elevation of the sun.

**Given:** The length of the shadow of a tower is increasing.

**To do: **To find the changes in the angle of elevation of the sun.

**Solution:**

We can express the angle of elevation as $tan\theta=\frac{height of the tower}{length of the shadow}$

$\therefore tan\theta$ get decreased as the the length of the shadow increases i.e $\theta$ get decreased.

In figure it has been shown that how the angle of elevation is decreasing with the increment in the length of the shadow.

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