NAME
    cosh - returns hyperbolic cosine of scalars and vectors.

SYNPOSIS
      float  cosh(float a);
      float1 cosh(float2 a);
      float2 cosh(float2 a);
      float3 cosh(float3 a);
      float4 cosh(float4 a);
 
      half   cosh(half a);
      half1  cosh(half2 a);
      half2  cosh(half2 a);
      half3  cosh(half3 a);
      half4  cosh(half4 a);
 
      fixed  cosh(fixed a);
      fixed1 cosh(fixed2 a);
      fixed2 cosh(fixed2 a);
      fixed3 cosh(fixed3 a);
      fixed4 cosh(fixed4 a);

PARAMETERS
    a       Vector or scalar of which to determine the hyperbolic cosine.

DESCRIPTION
    Returns the hyperbolic cosine of *a*.

    For vectors, the returned vector contains the hyperbolic cosine of each
    element of the input vector.

REFERENCE IMPLEMENTATION
    cosh for a scalar float could be implemented like this.

      float cosh(float x)
      {
        return 0.5 * (exp(x)+exp(-x));
      }

PROFILE SUPPORT
    cosh is supported in all profiles except fp20.

SEE ALSO
    the acos manpage, the cos manpage, the exp manpage, the sinh manpage,
    the tanh manpage

