表达式5: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesisRcost,Rsint
定义域t最小值： arc tangent left parenthesis, StartFraction, delta Over StartRoot, "R" squared minus delta squared , EndRoot , EndFraction , right parenthesisarctanδR2−δ2
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 2 pi minus arc tangent left parenthesis, StartFraction, delta Over StartRoot, "R" squared minus delta squared , EndRoot , EndFraction , right parenthesis2π−arctanδR2−δ2
5
表达式6: left parenthesis, "r" cos "t" , "r" sin "t" , right parenthesisrcost,rsint
定义域t最小值： arc tangent left parenthesis, StartFraction, delta Over StartRoot, "r" squared minus delta squared , EndRoot , EndFraction , right parenthesisarctanδr2−δ2
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： 2 pi negative arc tangent left parenthesis, StartFraction, delta Over StartRoot, "r" squared minus delta squared , EndRoot , EndFraction , right parenthesis2π−arctanδr2−δ2
6
表达式7: left parenthesis, "t" , negative delta , right parenthesist,−δ
定义域t最小值： StartRoot, "r" squared minus delta squared , EndRootr2−δ2
less than or equal to "t" less than or equal to≤t≤
定义域t最大值： StartRoot, "R" squared minus delta squared , EndRootR2−δ2
7
表达式8: left parenthesis, "t" , 0 , right parenthesist,0
定义域t最小值： 00
less than or equal to "t" less than or equal to≤t≤
