Expression 2: "r" Subscript, 1 , Baseline left parenthesis, "x" , right parenthesis equals 127.5 plus 127.5cosine left parenthesis, StartFraction, pi "x" Over 85 , EndFraction , right parenthesis left brace, 0 less than or equal to "x" less than or equal to 85 , right bracer1x=127.5+127.5cosπx850≤x≤85
2
Expression 3: "r" Subscript, 2 , Baseline left parenthesis, "x" , right parenthesis equals 127.5 minus 127.5cosine left parenthesis, StartFraction, pi "x" Over 85 , EndFraction , right parenthesis left brace, 170 less than or equal to "x" less than or equal to 255 , right bracer2x=127.5−127.5cosπx85170≤x≤255
3
Expression 4: "b" Subscript, 1 , Baseline left parenthesis, "x" , right parenthesis equals 127.5 plus 127.5cosine left parenthesis, StartFraction, pi "x" Over 85 , EndFraction , right parenthesis left brace, 85 less than or equal to "x" less than or equal to 255 , right braceb1x=127.5+127.5cosπx8585≤x≤255