Mathematics, 12.11.2019 19:31, hooplikenari

Tan(a+b+c)=tana+tanb+tanc-tana tanb tanc/1-tanb tanc-tanc tana-tana tanb

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Tan(a+b+c)=tana+tanb+tanc-tana tanb tanc/1-tanb tanc-tanc tana-tana tanb...