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Jan
28
revised Tracking a vehicle moving with uniform velocity?
Copyediting
Nov
6
revised How to measure the angle of the tangent to an ellipse?
Added the explicit answer.
Dec
2
revised Can this gravitational field differential equation be solved, or does it not show what I intended?
corrected error in markup
Sep
15
revised Solve $\sin x = 1 - x$
This problem has an exact analytical solution as an infinite series.