Im a first year student of physics. Because of coronavirus we have got online lessons, but my mechanic's lecturer doesn't like us, he didn't explain anything, just give us a problems to solve. I've got Landau-Lifshitz's book, but I even don't have enough caculus, to understand everything there. (there is the first and last equation, without derivation, I dont have even partial derivative in lessons [ofc., I learned it in my own, its not too bad, but Landau is still difficult]). Can you recommend me anything, that can help?

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    $\begingroup$ Are you taking advanced calculus simultaneously? If not drop this course and take advanced calculus. $\endgroup$ – G. Smith Mar 25 '20 at 20:19
  • $\begingroup$ Yes, ast semester I ended with single integrals. Now I've got second semester calculus, we just started partial derivative last week. I know, that's not good plan, but I can't choose a coutses, I have a plan in advance. $\endgroup$ – Lilla My Mar 25 '20 at 20:48
  • $\begingroup$ That's why I'm looking for some easier materials, who can explain mathematics in Landau. $\endgroup$ – Lilla My Mar 25 '20 at 20:49
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    $\begingroup$ @LillaMy : perhaps trying something that does not jump into Lagrangian Mechanics straightway may help. Taylor's book on classical mechanics, or Thornton and Marion come to mind. $\endgroup$ – insomniac Mar 25 '20 at 20:59
  • $\begingroup$ Thank you so much. :)) $\endgroup$ – Lilla My Mar 26 '20 at 10:24