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In DeltaABC, " if" (1)/(a+c)+(1)/(b+c)=(...

In `DeltaABC, " if" (1)/(a+c)+(1)/(b+c)=(3)/(a+b+c)` then show that `C=60^(@)`

A

` 60 ^(@) `

B

` 30 ^(@) `

C

` 90 ^(@)`

D

` 45 ^(@) `

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A
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