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t2ex

bsd_source/lib/libc/src_bsd/math/e_acosh.c - 2.0KB - 71 lines

51:             } else 
52:                 return log(x)+ln2;    /* acosh(huge)=log(2x) */
53:         } else if(((hx-0x3ff00000)|lx)==0) {
56:             t=x*x;
57:             return log(2.0*x-one/(x+sqrt(t-one)));
58:         } else {                       /* 1<x<2 */