Answers

2014-03-20T14:33:17+05:30
Tan(A+B) = (TanA+TanB)/(1-TanATanB) Tan(A-B) = (TanA - TanB)/(1+TanATanB) Cot(A+B) = (CotACotB-1)/(CotA + CotB) Cot(A-B)  .
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