Exercises
[1M9]Conversely, note then that β\(\cos y =\frac{e^{iy}+e^{-iy}} 2~ ~ ,~ ~ \sin y =\frac{e^{iy}-e^{-iy}}{i2}.\)
EDB β 1M9
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Authors:
"Mennucci , Andrea C. G."
.
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