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a^(2) cot A+ b^(2) cot B+ c ^(2) cot C =...

` a^(2) cot A+ b^(2) cot B+ c ^(2) cot C = `

A

` (abc)/ ( R ) `

B

` (2abc)/( R ) `

C

`( 3ab) /( R ) `

D

` S+ ( Delta )/ ( 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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