[" (a) right angled "],[" (c) isosceles ...

[" (a) right angled "],[" (c) isosceles "],[" 38.If in a "ABC" ,"],[[" (sin "A+sin B+sin C)(sin A+sin B-sin C)=3sin A sin B],[" then "],[" (a) "A=60^(@)" (b) "B=60^(@)" (c) "C=60^(@)" (d) none of these "],[" (a) "A=60^(@)" (b) "B=60^(@)" (c) "C=60^(@)" (d) none of these "]]

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