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  2. geometry - Archimedean spiral in cartesian coordinates -...

    math.stackexchange.com/questions/2622447/archimedean-spiral-in-cartesian...

    In fact, equation (4) defines a double Archimedean spiral (changing $(x,y)$ into $(-x,-y)$ doesn't change this equation). See picture below where the red curve is the Archimedean spiral, strictly speaking, and the magenta curve is its copy through a central symmetry. Equation (4) is less manageable than (3).

  3. Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

  4. simple geometry question- equation of cylinder

    math.stackexchange.com/questions/875569

    The equation of an object is a way of telling whether a point is part of an object -- if you substitute the coordinates of the point into the equation and the equation is true, then the point is on the object; if the equation is not true for that point, then the point is not on the object.

  5. calculus - Finding cartesian equation from parametric...

    math.stackexchange.com/questions/951363

    I'm trying to find the cartesian equation of the curve which is defined parametrically by: $$ x = 2\sin\theta, y = \cos^2\theta $$ Both approaches I take result in the same answer: $$ y = 1 - \s...

  6. For example, the square can be described with the equation $|x| + |y| = 1$. So is there a general equation that can describe a regular polygon (in the 2D Cartesian plane?), given the number of sides

  7. calculus - Finding Cartesian equations from parametric equations...

    math.stackexchange.com/questions/161338/finding-cartesian-equations-from...

    I am supposed to find a Cartesian equation by eliminating the parameters of ... This equation can be ...

  8. Converting an equation from Cartesian to Polar form?

    math.stackexchange.com/questions/2391910

    Converting Polar Equation to Cartesian Equation. 0. Polar coordinate form of circle equation. 0.

  9. Converting Cartesian equation in form x = y = z into Vector...

    math.stackexchange.com/questions/2219216/converting-cartesian-equation-in-form...

    Find the vector equation of the line with Cartesian equation: $$5x + 1 = -10y - 4 = 2z$$ I know the vector equation of a line is $\textbf{r} × \textbf{v} = \textbf{a} × \textbf{v}$, where $\textbf{r}$ is the position vector of a point on the line, $\textbf{a}$ is a fixed point on the line, and $\textbf{v}$ is a direction vector for $\textit{L ...

  10. Polar equation of a circle - Mathematics Stack Exchange

    math.stackexchange.com/questions/154550/polar-equation-of-a-circle

    Parabola equation from cartesian to polar representation. 0. how to convert y=sin(6x)+2 to polar. 0.

  11. Ellipse in polar coordinates - Mathematics Stack Exchange

    math.stackexchange.com/questions/315386

    EDIT1: What you at first proposed as ellipse looks like: The Ellipse parametrization is done differently. To more clearly distinguish between them we should note there are two different $\theta$ s, viz $\theta_{deLaHire}$ and the standard polar coordinate $\theta_{polar}$ used for central conics, ellipse in this case.