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/bionic/libm/upstream-freebsd/lib/msun/src/
H A Dcatrig.c70 * The code for casinh, casin, cacos, and cacosh comes first. The code is
80 * | casinh, casin, cacos, cacosh |
426 * cacosh(z) = I*cacos(z) or -I*cacos(z)
427 * where the sign is chosen so Re(cacosh(z)) >= 0.
430 cacosh(double complex z) function
438 /* cacosh(NaN + I*NaN) = NaN + I*NaN */
441 /* cacosh(NaN + I*+-Inf) = +Inf + I*NaN */
442 /* cacosh(+-Inf + I*NaN) = +Inf + I*NaN */
445 /* cacosh(0 + I*NaN) = NaN + I*NaN */

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