1*c9945492SAndroid Build Coastguard Worker #include "complex_impl.h" 2*c9945492SAndroid Build Coastguard Worker 3*c9945492SAndroid Build Coastguard Worker // FIXME: Hull et al. "Implementing the complex arcsine and arccosine functions using exception handling" 1997 4*c9945492SAndroid Build Coastguard Worker 5*c9945492SAndroid Build Coastguard Worker /* acos(z) = pi/2 - asin(z) */ 6*c9945492SAndroid Build Coastguard Worker cacos(double complex z)7*c9945492SAndroid Build Coastguard Workerdouble complex cacos(double complex z) 8*c9945492SAndroid Build Coastguard Worker { 9*c9945492SAndroid Build Coastguard Worker z = casin(z); 10*c9945492SAndroid Build Coastguard Worker return CMPLX(M_PI_2 - creal(z), -cimag(z)); 11*c9945492SAndroid Build Coastguard Worker } 12