式17: "C" Subscript, 1 , Baseline equals "X" plus 6cosine left parenthesis, 180 minus "A" Subscript, "B" "D" , Baseline minus "C" Subscript, "B" "D" , Baseline , right parenthesisC1=X+6cos180−ABD−CBD
17
式18: "C" Subscript, 2 , Baseline equals 6sine left parenthesis, 180 minus "A" Subscript, "B" "D" , Baseline minus "C" Subscript, "B" "D" , Baseline , right parenthesisC2=6sin180−ABD−CBD
式25: polygon left parenthesis, "A" , "B" , "C" , "D" , right parenthesispolygonA,B,C,D
25
式26: left parenthesis, "M" Subscript, 1 , Baseline plus "R" cos "t" , "M" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesisM1+Rcost,M2+Rsint