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If the equations ax +2bx +3c-0 and 3x2 +...

If the equations ax +2bx +3c-0 and 3x2 +8x+15 = 0 have a common root where a,b,c are the length of the sides of AABC then sin A+sin2 B +sin2 c is equal to 1) 1 2 3)V2 2

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