1.

If (sinA+sinB+sinC)^(2)=sin^(2)A+sin^(2)B+sin^(2)C, then which one is true?

Answer»

`SINA+SINB+SINC=0`
`cosA+cosB+cosC=0`
`(1)/(sinA)+(1)/(sinB)+(1)/(sinC)=0`
none of these

Answer :A


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