Expression 16: "m" Subscript, 1 , Baseline equals tangent left parenthesis, "A" Subscript, "B" "E" , Baseline minus 90 , right parenthesis equals negative 1.7 3 2 0 5 0 8 0 7 5 7m1=tanABE−90
equals=
negative 1.7 3 2 0 5 0 8 0 7 5 7−1.73205080757
16
Expression 17: "m" Subscript, 2 , Baseline equals tangent left parenthesis, 180 minus "A" Subscript, "B" "E" , Baseline , right parenthesis equals negative 0.5 7 7 3 5 0 2 6 9 1 8 9m2=tan180−ABE
equals=
negative 0.5 7 7 3 5 0 2 6 9 1 8 9−0.577350269189
17
Expression 18: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "E" Subscript, 1 , Baseline , right parenthesis Has graph. To audio trace, press ALT+T.y=m1x−E1
18
Expression 19: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "D" Subscript, 1 , Baseline , right parenthesis Has graph. To audio trace, press ALT+T.y=m2x−D1
19
Expression 20: "m" Subscript, 1 , Baseline "x" minus "m" Subscript, 1 , Baseline "E" Subscript, 1 , Baseline equals "m" Subscript, 2 , Baseline "x" minus "m" Subscript, 2 , Baseline "D" Subscript, 1 , Baselinem1x−m1E1=m2x−m2D1
