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[" 103.If "A,quad B,quad C" be the angle...

[" 103.If "A,quad B,quad C" be the angles of a triangle,then "],[|[-1,cos C,cos B],[cos C,-1,cos A],[cos B,cos A,-1]|=,[" KCET "2002;" WB "JEE2012]],[[" (a) "1],[" (c) "cos A cos B cos C," (b) "0]]

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