Question

please, give me a reference about the precession perihelion of newton theory
help me!

Answer 1

principia mathematica lol

Answer 2

you have about it?

Answer 3

why so \[\frac{ d \hat{r} }{ dt } = \hat{\theta}\frac{ d \theta }{ dt }\] and \[\frac{ d \hat{\theta} }{ dt } = - \hat{r} \frac{ d \theta }{ dt }\] in pictures