12.10.37 Hyperbolic cosine

Unsafe Operation: $cosh-fixnum fx

Compute the hyperbolic cosine of fx; return a flonum.

Unsafe Operation: $cosh-bignum bn

Compute the hyperbolic cosine of bn; return a flonum.

Unsafe Operation: $cosh-ratnum rt

Compute the hyperbolic cosine of rt; return a flonum.

Unsafe Operation: $cosh-flonum fl

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

Unsafe Operation: $cosh-compnum cn

Compute the hyperbolic cosine of cn; return a number object.

Unsafe Operation: $cosh-cflonum cfl

Compute the hyperbolic cosine of cfl; return a cflonum.