運算式 18: left parenthesis, "M" Subscript, 1 , Baseline plus "R" cos "t" , "M" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesisM1+Rcost,M2+Rsint
定義域 t 最小值： negative 90−90
less than or equal to "t" less than or equal to≤t≤
定義域 t 最大值： 9090
18
運算式 19: polygon left parenthesis, "A" , "B" , "C" , right parenthesispolygonA,B,C
19
運算式 20: polygon left parenthesis, "B" , "M" , right parenthesispolygonB,M
