Expression 1: StartAbsoluteValue, cos left parenthesis, "t" , right parenthesis "x" plus sin left parenthesis, "t" , right parenthesis "y" , EndAbsoluteValue plus StartAbsoluteValue, cos left parenthesis, "t" , right parenthesis "y" minus sin left parenthesis, "t" , right parenthesis "x" , EndAbsoluteValue equals 1 Has graph.costx+sinty+costy−sintx=1