1. Derivation of compound function: good at analytic geometry and function proving inequality)
2. Series related knowledge: it is very helpful for the summation of series inequalities.
3. Space straight line plane equation: Learn these well to ensure that all problems of solid geometry are solved. This is absolutely correct.
4. Parametric equation polar coordinates (included in indefinite integral): Polar parametric equation is the bane of conic curve, so it is recommended to learn.
I can't remember it all, that's all.
1 3 is highly recommended, and the other two are not recommended, which may not be worth the loss and delay the time.