Expression 2: 0 equals cosine left parenthesis, 10 left parenthesis, arctan left parenthesis, "y" , "x" minus 1 , right parenthesis plus arctan left parenthesis, "y" , "x" plus 1 , right parenthesis , right parenthesis , right parenthesis0=cos10arctany,x−1+arctany,x+1
2
Expression 3: 0 equals cosine left parenthesis, 10 left parenthesis, arctan left parenthesis, "y" , "x" minus 1 , right parenthesis minus arctan left parenthesis, "y" , "x" plus 1 , right parenthesis , right parenthesis , right parenthesis0=cos10arctany,x−1−arctany,x+1