12.10.31 Trigonometric cosine

Unsafe Operation: $cos-fixnum fx

Compute the trigonometric cosine of fx; return a fixnum or flonum.

Unsafe Operation: $cos-bignum bn

Compute the trigonometric cosine of bn; return a flonum.

Unsafe Operation: $cos-ratnum rt

Compute the trigonometric cosine of rt; return a flonum.

Unsafe Operation: $cos-flonum fl

Compute the trigonometric cosine of fl; return a flonum. This is an alias for $flcos.

Unsafe Operation: $cos-cflonum cfl

Compute the trigonometric cosine of cfl; return a cflonum.

Unsafe Operation: $cos-compnum cn

Compute the trigonometric cosine of cn; return a cflonum.