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If A+B+C=pi then prove that cos3A. cos3B+cos3B. cos3C+cos3C. cos3A=1...
Mathematics, 17.04.2020 14:54 jordan2875
Math
If A+B+C=pi then prove that cos3A. cos3B+cos3B. cos3C+cos3C. cos3A=1
Answers: 3
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