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किसी धान के खेत के बीचो बीच ऊर्ध्वदार खाडी की गई एक मीनार के शीर्ष का उन्नयन कोंढ , मीनार के तल से होकर क्षेतिज रेखा पर दो बिन्दुओ से `alpha` और `beta` `(alpha gt beta)` मीनार की यूनिट है । बिन्दुओ के बीच संभावित दूरी ( उसी यूनिट में ) है :
A. `(h(cot beta -cot alpha))/(cos (alpha+beta))`
B. `h(cot alpha-cot beta)`
C. `(h(tan beta-tan alpha))/(tan alpha tan beta)`
D. `h (cot alpha + cot beta)`

1 Answer

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Best answer
Correct Answer - D
image
In `triangleABD`
`tan alpha=h/(BD)`
BD=hcot `alpha`…(i)
In `triangleACD`
`tan beta =h/(CD)`
CD=hcot`beta`…(ii)
BC=BD+CD
=h(cot `alpha`+cot `beta`)

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