/// <summary>
/// Computes the cosine of a double double value.
/// </summary>
/// <param name="x">The argument of the cosine.</param>
/// <returns>The value of cos(x).</returns>
/// <remarks><para>Unlike <see cref="MoreMath.Cos(double)"/>, this function does not currenly do range reduction with a value
/// of pi even more accurate than <see cref="DoubleDouble.Pi"/>. Therefore, beyond the first few periods, results can slowly
/// loose accuracy, particularly near zeros, at the rate of about one digit per order of magnitude of the argument.</para></remarks>
public static DoubleDouble Cos(DoubleDouble x)
{
return(DoubleDoubleMath.Cos(x));
}
/// <summary>
/// Computes the sine of a double double value.
/// </summary>
/// <param name="x">The argument of the sine.</param>
/// <returns>The value of sin(x).</returns>
/// <remarks><para>Unlike <see cref="MoreMath.Sin(double)"/>, this function does not currenly do range reduction with a value
/// of pi even more accurate than <see cref="DoubleDouble.Pi"/>. Therefore, beyond the first few periods, results can slowly
/// loose accuracy, particularly near zeros, at the rate of about one digit per order of magnitude of the argument.</para></remarks>
public static DoubleDouble Sin(DoubleDouble x)
{
return(DoubleDoubleMath.Sin(x));
}