deletions | additions       diff --git a/Now_that_we_understand_why__.tex b/Now_that_we_understand_why__.tex  index a2b73bc..120a16a 100644  --- a/Now_that_we_understand_why__.tex  +++ b/Now_that_we_understand_why__.tex 
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\begin {equation}  \theta (inclination) = arcos (b/a)  \end {equation}. {equation}  where b is the semi-minor axis and a is the semi-major axis.