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cacos
Complex circular arc cosine.SYNOPSIS:
void cacos();
cmplx z, w;
cacos(&z, &w);
DESCRIPTION:
w = arccos z = PI/2 - arcsin z.
ACCURACY:
Relative error:
arithmetic domain # trials peak rms
DEC -10,+10 5200 1.6e-15 2.8e-16
IEEE -10,+10 30000 1.8e-14 2.2e-15