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reesewaggoner8
14.09.2019 •
Mathematics
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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Ответ:
By DeMoivre's theorem,
Expanding the right side gives
Equating imaginary parts tells us
(Not sure what you mean by sin(e) and cos(e)...)
Ответ:
2.)12.778
3.)16
4.)106.25
5.) 271.17
6.) 4136.96
7.)2614.68
8.)172.387
9.)23126.4
10.) 39.834