1.

a, b, c are the lengths of three sides of a DeltaABC. If a, b, c are related by the relation a^(2)+b^(2)+c^(2)=ab+bc+ca, then the value of (sin^(2)A+sin^(2)B+sin^(2)C) is

Answer»

`(3)/(4)`
`(3)/(2)`
`(3SQRT3)/(2)`
`(9)/(4)`

ANSWER :D


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