Задача 72188 [3([m]cos 11[/m] + i [m]sin 11[/m])]^3...

62aaac79225ec1501a9067b6

30.06.2023 07:16:39

[3([m]cos 11[/m] + i [m]sin 11[/m])]^3

5f3ea7e3faf909182968ddd9

30.06.2023 15:17:36

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[m](3(cos11 + i sin11))^3=(3\cdot e^{11i})^3=3^3\cdot (e^{11i})^3=27\cdot (e^{11i\cdot 3})=27\cdot (e^{33i})=27(cos33+isin33)[/m]