Mathematics, 14.09.2019 12:10, lily3934

Use de moivre's formula to derive the identity sin(40) = 4 cos (0) sin(e) - 4 cos(e) sin (0) as well as a similar "quadruple angle" formula for cos(40). s eeeotoble to leave answer in polar or

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Use de moivre's formula to derive the identity sin(40) = 4 cos (0) sin(e) - 4 cos(e) sin (0) as well...