運算式 5: "X" left parenthesis, "T" , "t" , right parenthesis equals "M" left parenthesis, 0 , "P" positive "A" cos left parenthesis, left parenthesis, 2.4 minus "r" left parenthesis, "P" , right parenthesis , right parenthesis left parenthesis, pi "r" left parenthesis, "P" , right parenthesis plus "T" minus "k" left parenthesis, 1 minus "t" , right parenthesis , right parenthesis , right parenthesis , "t" , right parenthesisXT,t=M0,P+Acos2.4−rPπrP+T−k1−t,t
5
運算式 6: "Y" left parenthesis, "T" , "t" , right parenthesis equals "M" left parenthesis, negative 7 , 7 plus 3 "r" left parenthesis, 1.5 "P" , right parenthesis plus "A" sin left parenthesis, left parenthesis, 1.7 plus "r" left parenthesis, "P" , right parenthesis , right parenthesis left parenthesis, pi "r" left parenthesis, "P" , right parenthesis plus "T" minus "k" left parenthesis, 1 minus "t" , right parenthesis , right parenthesis , right parenthesis , "t" , right parenthesisYT,t=M−7,7+3r1.5P+Asin1.7+rPπrP+T−k1−t,t
6
運算式 7: left parenthesis, "X" left parenthesis, "T" Subscript, 0 , Baseline , "t" , right parenthesis , "Y" left parenthesis, "T" Subscript, 0 , Baseline , "t" , right parenthesis , right parenthesisXT0,t,YT0,t
00
定義域 t 最小值：
less than or equal to "t" less than or equal to≤t≤
