=============

It is a parabola or similar parabola in the process of launch and recovery, and a three-stage rocket in the process of launch, so it is still a parabola with different derivatives, and the function definition domain needs to be segmented.

=============

There is also the need to use geometry when the rocket communicates with the ground, but it is not plane geometry, but surface geometry. Also known as non-Euclidean geometry, it is also a mathematical problem.

=============

The space orbit of Shenzhou-10 also has an elliptic curve, which is also a mathematical problem, and the appearance curve of the return capsule is also a mathematical problem.

There are too many such problems, and mathematics and physics are not separated. Many people don't know what mathematics is and what physics is, but there is no need to distinguish it too clearly. Many things in science are interlinked.