運算式 21: polygon left parenthesis, "A" , "B" , "C" , "D" , right parenthesispolygonA,B,C,D
21
運算式 22: left parenthesis, "M" Subscript, 1 , Baseline plus "R" cos "t" , "M" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesisM1+Rcost,M2+Rsint
00
定義域 t 最小值:
less than or equal to "t" less than or equal to≤t≤