NAME
    cosh - returns hyperbolic cosine of scalars and vectors.

SYNOPSIS
      float  cosh( float  a );
      float1 cosh( float1 a );
      float2 cosh( float2 a );
      float3 cosh( float3 a );
      float4 cosh( float4 a );
 
      half   cosh( half  a );
      half1  cosh( half1 a );
      half2  cosh( half2 a );
      half3  cosh( half3 a );
      half4  cosh( half4 a );
 
      fixed  cosh( fixed  a );
      fixed1 cosh( fixed1 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

