The length of the shadow of a tower on the plane ground is $\sqrt{3}$ times the height of the tower. Find the angle of elevation of the sun.

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Step 1: Let AB be the tower of height $h$. Shadow $AC = \sqrt{3}h$. In $	riangle ABC$, $	an	heta = \frac{AB}{AC} = \frac{h}{\sqrt{3}h}$
Step 2: $\Rightarrow 	an	heta = \frac{1}{\sqrt{3}} \Rightarrow 	heta = 30°$

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