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prove the following: cotA×cotB+cotB×cotC+cotC×cotA=1 prove the following:cotA×cotB+cotB×cotC+cotC×cotA=1
this is true only if a+b+c= piproof: tan(a+b+c)=tanpi=0(tana+tanb+tanc – tanatanbtanc)/(1 – tanatanb – tanbtanc – tanctana) = 0or tana+tanb+tanc= tanatanbtancor 1/tanbtanc + 1/tanatanc + 1/tanatanb= 1or cotA×cotB+cotB×cotC+cotC×cotA=1KINDLY APPROVE :))
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