final private int[] getFlags( Function f ) {
		int[] rtn = new int[ 0 ];
		if ( f instanceof Sine || f instanceof Cosine || f instanceof Tangent || 
				f instanceof Cosecant || f instanceof Secant || f instanceof Cotangent || 
				f instanceof Arcsine || f instanceof Arccosine || f instanceof Arctangent ) {
			rtn = new int[]{ this.m_angleType };
		}
		return rtn;
	}