nischallohani61 nischallohani61

02-02-2020
Mathematics

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if a + b + c =180 and cosa = cosb +cosc than prove that cotb *cotc=1/2

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7419539855 7419539855

02-02-2020

can you please translate that to english?

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cvhdhdhd cvhdhdhd

02-02-2020

Sorry I dontunder stand

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