A) \[{{60}^{o}}\]
B) \[{{30}^{o}}\]
C) \[{{45}^{o}}\]
D) \[{{15}^{o}}\]
Correct Answer: B
Solution :
\[\tan \alpha =\frac{h}{\sqrt{3}h}=\frac{1}{\sqrt{3}}\] \[\Rightarrow \] \[\alpha ={{30}^{o}}\].
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