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In A B C , if (sinA)/(csinB)+(sinB)/c+(...

In ` A B C ,` if `(sinA)/(csinB)+(sinB)/c+(sinC)/b=c/(a b)+b/(a c)+a/(b c),` then the value of angle `A` is (a)`120^0` (b) `90^0` (c) `60^0` (d) `30^0`

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