Tagged Questions
2
votes
2answers
112 views
Did I write the right “expressions”?
$9$. Consider the parametric curve $K\subset R^3$ given by
$$x = (2 + \cos(2s)) \cos(3s)$$
$$y = (2 + \cos(2s)) \sin(3s)$$
$$z = \sin(2s)$$
a) Express the equations of K as polynomial ...
0
votes
1answer
372 views
Bearing from one point to another on 2D number plane
Title says it all, I'm looking for the formula to get the bearing from one point to another on a number plane. I have found examples of this for lat/lon around the earth but that's not exactly what i ...
1
vote
1answer
141 views
Ancient astronomers, planetary conjunctions, and epicycles
How did ancient astronomers predict planetary conjunctions? I know they used a system of epicycles to represent the path of planets, but finding the point and time of alignment of two planets still ...
