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प्रश्न
The ratio of the length of a rod and its shadow is `1 : sqrt3`. The angle of elevation of the sum is
विकल्प
30°
45°
60°
90°
उत्तर
Let θ be angle of elevation of sun.
Given that: angle of elevation is `60°`from tower of foot and distance`BC=100` meters.
Here, we have to find the height of tower.
So we use trigonometric ratios.
In a triangle `ABC`
`⇒ tan C=( AB)/(BC)`
`⇒ tan 60°= (AB)/(BC)`
`⇒ sqrt 3=h/100`
`⇒=100sqrt3`
Hence correct option is `a`.
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