A) \[{{45}^{o}}\]
B) \[{{60}^{o}}\]
C) \[{{75}^{o}}\]
D) \[{{30}^{o}}\]
Correct Answer: B
Solution :
Let\[\phi \] be the angle of elevation and \[AC=\] height of tower \[=100\sqrt{3}m\] \[\therefore \] \[AB=100\,\,m\] \[\tan \phi =\frac{AC}{AB}=\frac{100\sqrt{3}}{100}=\sqrt{3}\] or \[\tan \phi =\tan {{60}^{o}}\] \[\Rightarrow \] \[\phi ={{60}^{o}}\] Hence angle of elevation is\[{{60}^{o}}\]You need to login to perform this action.
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