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/illumos-gate/usr/src/lib/libm/common/complex/
H A Dctanh.c30 #pragma weak __ctanh = ctanh
34 * dcomplex ctanh(dcomplex z);
37 * ctanh z = --------------------- = --------------------
44 * cosh 2x = sinh 2x = --- e and hence ctanh z = 1 + i -----------;
76 * ctanh z = --------------------------- + i --------------------------
80 * ctanh(0,0)=(0,0)
81 * ctanh(x,inf) = (NaN,NaN) for finite x
82 * ctanh(x,NaN) = (NaN,NaN) for finite x
83 * ctanh(inf,y) = 1+ i*0*sin(2y) for positive-signed finite y
84 * ctanh(in
98 ctanh(dcomplex z) { function
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