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If alpha,beta,gamma are the lengths of t...

If `alpha,beta,gamma` are the lengths of the altitudes of `Delta ABC`, then `cosA/alpha+cosB/beta+cosC/gamma=`

A

` Delta `

B

` (1)/( Delta ) `

C

` R `

D

` (1) /( R ) `

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The correct Answer is:
A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - II
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