Expression 16: tangent to the negative 1st power StartFraction, "B" Subscript, 1 , Baseline minus "A" Subscript, 1 , Baseline Over "B" Subscript, 2 , Baseline , EndFraction minus tangent to the negative 1st power StartFraction, "B" Subscript, 1 , Baseline minus "D" Subscript, 1 , Baseline Over "B" Subscript, 2 , Baseline , EndFraction equals "A" Subscript, "B" "D" , Baselinetan−1B1−A1B2−tan−1B1−D1B2=ABD
16
Expression 17: "D" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline minus "B" Subscript, 2 , Baseline tangent left parenthesis, tan to the negative 1st power StartFraction, "B" Subscript, 1 , Baseline minus "A" Subscript, 1 , Baseline Over "B" Subscript, 2 , Baseline , EndFraction minus "A" Subscript, "B" "D" , Baseline , right parenthesisD1=B1−B2tantan−1B1−A1B2−ABD
