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In a triangle A B C ,a=4,b=3,/A=60^0 the...

In a triangle `A B C ,a=4,b=3,/_A=60^0` then `c` is root of the equation `c^2-3c-7=0` (b) `c^2+3c+7=0` (c) `c^2-3c+7=0` (d) `c^2+3c-7=0`

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