運算式 17: "y" less than or equal to tangent left parenthesis, "a" , right parenthesis "x" left brace, pi less than "a" less than or equal to StartFraction, 3 pi Over 2 , EndFraction , right brace left brace, StartRoot, 9 minus "x" squared , EndRoot greater than "y" greater than 0 , right bracey≤tanaxπ<a≤3π29−x2>y>0
17
運算式 18: "y" less than or equal to tangent left parenthesis, "a" , right parenthesis "x" left brace, StartFraction, 3 pi Over 2 , EndFraction less than "a" less than or equal to 2 pi , right brace left brace, left parenthesis, negative StartRoot, 9 minus "x" squared , EndRoot , right parenthesis less than "y" less than 0 , right bracey≤tanax3π2<a≤2π−9−x2<y<0
18
運算式 19: "y" greater than or equal to tangent left parenthesis, "a" , right parenthesis "x" left brace, StartFraction, 3 pi Over 2 , EndFraction less than "a" less than or equal to 2 pi , right brace left brace, StartRoot, 9 minus "x" squared , EndRoot greater than "y" greater than 0 , right bracey≥tanax3π2<a≤2π9−x2>y>0
19
運算式 20: "r" equals 3sine 2 theta left brace, theta less than or equal to "a" , right bracer=3sin2θθ≤a
20
運算式 21: left parenthesis, 3sin left parenthesis, 2 "b" , right parenthesis cos left parenthesis, "b" , right parenthesis , 3sin left parenthesis, 2 "b" , right parenthesis sin left parenthesis, "b" , right parenthesis , right parenthesis3sin2bcosb,3sin2bsinb
21
運算式 22: left parenthesis, 3sin left parenthesis, 2 "a" , right parenthesis cos left parenthesis, "a" , right parenthesis , 3sin left parenthesis, 2 "a" , right parenthesis sin left parenthesis, "a" , right parenthesis , right parenthesis3sin2acosa,3sin2asina
22
運算式 23: left parenthesis, 0 , 0 , right parenthesis0,0