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[" Side "BC" of a triangle "ABC" has bee...

[" Side "BC" of a triangle "ABC" has been produced to a point "D],[" such that "/_ACD=120" .If "/_B=(1)/(2)/_A" ,then "/_A" is equal to "],[[" (A) "80^(@)," (B) "75," (C) "60^(@)," I "]]

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