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Mathematics, 01.04.2020 20:42, TheRunningPotatoe245
If A+B+C=180 then prove
Cos3Acos3B+cos3Bcos3C+cos3Ccos3A=1
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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Do you know the correct answer?
If A+B+C=180 then prove
Cos3Acos3B+cos3Bcos3C+cos3Ccos3A=1...
Cos3Acos3B+cos3Bcos3C+cos3Ccos3A=1...
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