Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi mathvariant="normal">sin</mml:mi><mml:mn>2</mml:mn><mml:mi>β</mml:mi></mml:math> in Tree Dominated B0 Decays and Ambiguity Removal