If A+B+C=180 then prove that
Cos3Acos3B+cos3Bcos3C+cos3Ccos3A=1...
Mathematics, 05.05.2020 22:59 AutumnJoy12
If A+B+C=180 then prove that
Cos3Acos3B+cos3Bcos3C+cos3Ccos3A=1
Answers: 1
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