นิพจน์ 16: "A" Subscript, 1 , Baseline equals "R" cosine left parenthesis, 180 plus StartFraction, 180 minus "A" Subscript, "O" "B" , Baseline Over 2 , EndFraction , right parenthesis equals negative 2.5A1=Rcos180+180−AOB2
equals=
negative 2.5−2.5
16
นิพจน์ 17: "A" Subscript, 2 , Baseline equals "R" sine left parenthesis, 180 plus StartFraction, 180 minus "A" Subscript, "O" "B" , Baseline Over 2 , EndFraction , right parenthesis equals negative 1.6 6 9 8 7 2 9 8 1 0 8A2=Rsin180+180−AOB2
