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The angle of elevation of the top of the...

The angle of elevation of the top of the tower observed from each of three points A,B , C on the ground, forming a triangle is the same angle `alpha.` If R is the circum-radius of the triangle ABC, then find the height of the tower R `tan alpha. `

A

`R sin alpha`

B

`R cos alpha`

C

`R cot alpha`

D

`R tan alpha`

Text Solution

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The correct Answer is:
D
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