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P(1), P(2), P(3) are altitudes of a tria...

`P_(1), P_(2), P_(3)` are altitudes of a triangle ABC from the vertices A, B, C and `Delta` is the area of the triangle,
The value of `(cos A)/P_(1) + (cos B)/P_(2) + (cos C)/P_(3)` is equal to-

A

`1/R`

B

`(a^(2) + b^(2) +c^(2))/(2R)`

C

`Delta/(2R)`

D

none of these

Text Solution

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The correct Answer is:
A
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