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MATH / If e^(iα)=(3)/(5)+(4)/(5)i and e^(iβ)=−(12)/(13)+(5)/(13)i, then find cos(α−β). · Discussion

Discussing If e^(iα)=(3)/(5)+(4)/(5)i and e^(iβ)=−(12)/(13)+(5)/(13)i, then find cos(α−β). · MATH

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