Expression 1: left brace, sin 0.5 "y" less than 0 : 0 , 1 , right brace times left brace, cos 0.5 "x" less than 0 : 0 , 1 , right brace times left brace, cos "x" greater than cos "y" : 1 , 0 , right brace equals 0 Has graph.sin0.5y<0:0,1·cos0.5x<0:0,1·cosx>cosy:1,0=0
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