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In Delta ABC,a(b cos C-c cos B)=...

In `Delta ABC,a(b cos C-c cos B)=`

A

` b^(2) - c^( 2) `

B

` b^(2) + c^(2)`

C

` (1)/(b) + (1)/ ( c ) `

D

` (1)/( b^(2)) + ( 1 ) /( c ^(2) `

Text Solution

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The correct Answer is:
A
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