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Wrong formulas

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The correct formulas for complex trigonometry require
cos(z) = (exp(iz) + exp(-iz)) / 2
sin(z) = (exp(iz) - exp(-iz)) / (2i)
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Kushagra 2026-03-15 14:54:27 +05:30
parent cf70668a2f
commit 9a733a623c
1 changed files with 2 additions and 2 deletions
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python/cmath.py
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@ -134,10 +134,10 @@ def atan(z: complex):
return 1j / 2 * log((1 - 1j * z) / (1 + 1j * z))
def cos(z: complex):
return (exp(z) + exp(-z)) / 2
return (exp(1j * z) + exp(-1j * z)) / 2
def sin(z: complex):
return (exp(z) - exp(-z)) / (2 * 1j)
return (exp(1j * z) - exp(-1j * z)) / (2 * 1j)
def tan(z: complex):
return sin(z) / cos(z)