12.10.34 Trigonometric arc cosine

Unsafe Operation: $acos-fixnum fx

Compute the trigonometric arc cosine of fx; return a flonum or compnum or cflonum.

Unsafe Operation: $acos-bignum bn

Compute the trigonometric arc cosine of bn; return a flonum or compnum or cflonum.

Unsafe Operation: $acos-ratnum rt

Compute the trigonometric arc cosine of rt; return a flonum or compnum or cflonum.

Unsafe Operation: $acos-flonum fl

Compute the trigonometric arc cosine of fl; return a flonum or compnum or cflonum.

Unsafe Operation: $acos-cflonum cfl

Compute the trigonometric arc cosine of fl; return a cflonum.

Unsafe Operation: $acos-compnum cn

Compute the trigonometric arc cosine of fl; return a number object.