運算式 3: "r" equals StartFraction, 1 Over "a" , EndFractionr=1a
00
定義域 \theta 最小值：
less than or equal to theta less than or equal to≤θ≤
12 pi12π
定義域 \theta 最大值：
equals=
0.2 0 8 2 0 1 5 1 8 5 50.20820151855
3
運算式 4: left parenthesis, mod left parenthesis, "x" , 2 "L" , right parenthesis minus StartFraction, "L" Over 2 , EndFraction minus "r" sin left parenthesis, StartFraction, "a" Over 2 , EndFraction , right parenthesis , right parenthesis squared plus left parenthesis, "y" plus "r" cos left parenthesis, StartFraction, "a" Over 2 , EndFraction , right parenthesis , right parenthesis squared equals "r" squared left brace, "y" greater than 0 , right bracemodx,2L−L2−rsina22+y+rcosa22=r2y>0
4
運算式 5: left parenthesis, mod left parenthesis, "x" plus "L" , 2 "L" , right parenthesis minus StartFraction, "L" Over 2 , EndFraction minus "r" sin left parenthesis, StartFraction, "a" Over 2 , EndFraction , right parenthesis , right parenthesis squared plus left parenthesis, "y" minus "r" cos left parenthesis, StartFraction, "a" Over 2 , EndFraction , right parenthesis , right parenthesis squared equals "r" squared left brace, "y" less than 0 , right bracemodx+L,2L−L2−rsina22+y−rcosa22=r2y<0
