γ : Angle at the Center
δ : Angle between ray O-A and tangent at x
d : distance x-A
34
Expression 35: gamma equals StartAbsoluteValue, alpha minus beta , EndAbsoluteValueγ=α−β
equals=
46.4 446.44
35
Expression 36: delta equals 90 minus gammaδ=90−γ
equals=
43.5 643.56
36
Expression 37: "d" equals StartRoot, "r" squared plus "r" squared minus 2 left parenthesis, "r" Subscript, 1 , Baseline times "r" Subscript, 2 , Baseline , right parenthesis times cos gamma , EndRootd=r21+r22−2r1·r2·cosγ
equals=
2.9 1 0 8 3 3 7 1 8 5 32.91083371853
37
Using the law of cosines
en.wikipedia.org/wiki/Law_of_cosines
