Answers

2014-04-07T15:14:07+05:30
TanA*cotA = TanA*1./TanA = 1
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2014-04-07T15:14:15+05:30
1, because TanA * CotA further simplifies to TanA* (1/TanA).
TanA cancels out. Therefore TanA * CotA = 1.
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