Expression 1: "y" equals tangent "x" left brace, "x" less than StartFraction, pi Over 2 , EndFraction , right brace left brace, "x" greater than negative StartFraction, pi Over 2 , EndFraction , right brace left brace, "y" greater than 0 , right bracey=tanxx<π2x>−π2y>0
1
Expression 2: "y" equals co tangent left parenthesis, "x" plus StartFraction, pi Over 2 , EndFraction , right parenthesis left brace, "x" less than pi , right brace left brace, "x" greater than 0 , right brace left brace, "y" greater than 0 , right bracey=cotx+π2x<πx>0y>0