MCQOPTIONS
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MCQOPTIONS
| 1. |
The angle of elevation of the top of a tower from a point A due south of the tower is \[\alpha \]and from a point B due east of the tower is \[\beta \]. If AB =d, then the height of the tower is [Roorkee 1979; Kurukshetra CEE 1998] |
| A. | \[\frac{d}{\sqrt{{{\tan }^{2}}\alpha -{{\tan }^{2}}\beta }}\] |
| B. | \[\frac{d}{\sqrt{{{\tan }^{2}}\alpha +{{\tan }^{2}}\beta }}\] |
| C. | \[\frac{d}{\sqrt{{{\cot }^{2}}\alpha +{{\cot }^{2}}\beta }}\] |
| D. | \[\frac{d}{\sqrt{{{\cot }^{2}}\alpha -{{\cot }^{2}}\beta }}\] |
| Answer» D. \[\frac{d}{\sqrt{{{\cot }^{2}}\alpha -{{\cot }^{2}}\beta }}\] | |