tam gic abc co dac diem gi neu √tan a+√tanb +√tanc=√cota/2 + √ cotb/2 +√cotc/2
tim dang tam giac thoa man √tan a+√tanb +√tanc=√cota/2 + √ cotb/2 +√cotc/2
Started By datvivu, 31-08-2015 - 19:19
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