casin, casinf, casinl

Retrieves the arcsine of a complex number, with branch cuts outside the interval [-1, +1] along the real axis.


_Dcomplex casin(
   _Dcomplex z
_Fcomplex casin(
   _Fcomplex z
);  // C++ only
_Lcomplex casin(
   _Lcomplex z
);  // C++ only
_Fcomplex casinf(
   _Fcomplex z
_Lcomplex casinl(
   _Lcomplex z


A complex number that represents an angle, in radians.

Return value

The arcsine of z, in radians. The result is unbounded along the imaginary axis, and in the interval [-π/2, +π/2] along the real axis.


Because C++ allows overloading, you can call overloads of casin that take and return _Fcomplex and _Lcomplex values. In a C program, casin always takes and returns a _Dcomplex value.


Routine C header C++ header
casin, casinf, casinl <complex.h> <ccomplex>

For more compatibility information, see Compatibility.

See also

Alphabetical function reference
catanh, catanhf, catanhl
ctanh, ctanhf, ctanhl
catan, catanf, catanl
csinh, csinhf, csinhl
casinh, casinhf, casinhl
ccosh, ccoshf, ccoshl
cacosh, cacoshf, cacoshl
cacos, cacosf, cacosl
ctan, ctanf, ctanl
csin, csinf, csinl
ccos, ccosf, ccosl
csqrt, csqrtf, csqrtl