Complex exponential function
double complex cexp(double complex z);
float complex cexpf(float complex z);
long double complex cexpl(long double complex z);
Link with -lm.
The function calculates e (2.71828..., the base of natural logarithms) raised to the power of z.
cexp(I * z) = ccos(z) + I * csin(z)
These functions first appeared in glibc in version 2.1.
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