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Five math problems around me
There are too many questions, so I will take them one by one. The first one—

Parametric equation of ellipse

x=a

cosθ

y=b

sinθ

A is the long semi-axis.

long

B is the length of the minor axis.

θ is a parameter.

In this problem, x=7782.5 is specific.

cosθ

y=772 1.5sinθ

I don't know what I said, do you understand? If it is good, give it an acceptance, and I will continue to answer the following questions;

If the answer is not good, keep asking. If you have any questions, ask as many as possible. I'm here! Until things get better.

I don't know if I understand this.