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Mathematics, 28.12.2020 18:20 adlaremse2987
IF A+B+C=Π prove that sin(3A)+sin(3B)+sin(3C)=-4cos(3A÷2) cos(3B÷2)cos(3C÷2)
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IF A+B+C=Π prove that sin(3A)+sin(3B)+sin(3C)=-4cos(3A÷2) cos(3B÷2)cos(3C÷2)...
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