
What is the difference between equation and formula?
An equation is meant to be solved, that is, there are some unknowns. A formula is meant to be evaluated, that is, you replace all variables in it with values and get the value of the formula. …
What is the equation for a 3D line? - Mathematics Stack Exchange
May 28, 2013 · I love your answer for a line equation in the form of z = f (x, y)... Unfortunately calculating square roots can be impractical from the calculational standpoint and hence I really …
Equation of a rectangle - Mathematics Stack Exchange
Oct 2, 2011 · I need to graph a rectangle on the Cartesian coordinate system. Is there an equation for a rectangle? I can't find it anywhere.
simple geometry question- equation of cylinder
Jul 23, 2014 · 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 …
General formula for solving quartic (degree $4$) equations
Jul 28, 2010 · Could you change the title to "Is there a general formula for solving 4th degree polynomial equations" or "Is there a general formula for solving quartic equations?"
Notation for rounding in equation - Mathematics Stack Exchange
I'm wondering if there is a symbol or notation for Round to the nearest 10th For example, the area of a circle with a radius of 45 feet, rounded to the nearest square foot, could be written as, A =...
Ellipse in polar coordinates - Mathematics Stack Exchange
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 …
贝塞尔函数及其性质 - 知乎
贝塞尔方程 (the Bessel differential equation)在物理学诸多领域都有非常广泛的应用,如柱坐标下波的传播,薛定谔方程的解,薄膜振动,热传导等等。下面不加证明地总结贝塞尔函数的一些 …
geometry - Get the equation of a circle when given 3 points ...
Apr 20, 2017 · Get the equation of a circle through the points $(1,1), (2,4), (5,3) $. I can solve this by simply drawing it, but is there a way of solving it (easily) without having to draw?
What exactly is an equation? - Mathematics Stack Exchange
Apr 15, 2018 · the equation to simpler equation (s) and end up with an equation that can be solved by inspection. In all these cases the equality tells you two things are really the same. …