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16.01.2021 •
Mathematics
A quintic polynomial has rational coefficients. If 1, 3 and 2 – 3i are roots, what are the remaining roots?
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Ответ:
The trigonometric values for cos are C = A/H, which means that to find cos(60), you need to divide the adjacent side by the hypotenuse, which in this case gives you 1/2, so that is the value of cos(60).
I hope this helps!