SOLUTION: cotA+cotB/tanA+tanB=cotB/tanA

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Question 468817: cotA+cotB/tanA+tanB=cotB/tanA
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
%28cotA%2BcotB%29%2F%28tanA%2BtanB%29=cotB%2FtanA
Let work with the left side of the identity