Polar equations Definition and 24 Threads

I made this exercise up to acquire more skill with polar coordinates. The idea is you're given the acceleration vector and have to find the position vector corresponding to it, working in reverse of the image. My attempts are the following, I proceed using 3 "independent" methods just as you...

Hello, In the plane, using Cartesian coordinates ##x## and ##y##, an equation (or a function) is a relationship between the ##x## and ##y## variables expressed as ##y=f(x)##. The variable ##y## is usually the dependent variable while ##x## is the independent variable. The polar coordinates...

After seeing a discussion about graphs of the relationship ##x^x + y^y = r^r##, it got me interested in attempting to see what the graphical appearance of ##{^{\infty}x}+{^{\infty}y}={^{\infty}r}## would look like. The first step I did was use the relationship of...

Homework Statement Find the area of the region that lies inside the first curve and outside the second curve. ##r=6## ##r=6-6sin(\theta)## Homework Equations ##A=\frac {1} {2}r^2\theta## The Attempt at a Solution \[/B] If I'm correct, the area should just be ##\frac {1} {2}\int_{0}^{2\pi} 6^2...

Homework Statement Hello! I am struggling with plotting polar graphs manually (without any help of the calculator). My main unresolved issue is with finding correct values of theta in a given range. For example, I have an equation: $r = cos(5\theta)$ Homework Equations and I know that the...

Homework Statement Hello! I will be grateful for your help in deciphering the meaning of a paragraph from the book. I honestly don't understand how they got the semi-circle on the xy graph by transferring it from rθ graph. Homework Equations I attach the screen shot from the book. The Attempt...

Homework Statement On the surface of a river at ##t=0## there is a boat 1 (point ##F_0##) at a distance ##r_0## from the point ##O## (the coordinate beginning) which is on the right side of the coast (picture uploaded below). A line ##OF_0## makes an angle ##θ_0=10°## with the ##x-axis## whose...

1. The question The position of a particle is given by r(t) = acos(wt) i + bsin(wt) j. Assume a and b are both positive and a > b. The plane polar coordinates of a particle at a time t equal to 1/8 of the time period T will be given by _ Homework Equations r(t) = acos(wt) i + bsin(wt) j. The...

Just couldn't find help with this anywhere but Using the desmos graphing calculator using the table feature I wanted to plot the points every $\frac{\pi}{12}$ $0<\theta<2\pi$ For $r=-2-3\sin(\theta)$ On a polar coordinate graph

This is a problem that has been bugging me all day. While working with the well-known dydx = rdrdθ, where r is a function of θ I divided both sides of the equation by dxdθ to get dy/dθ = r(dr/dx) For the left side, I use y = rsinθ and derive with respect to θ to get dy/dθ = sinθdr/dθ + rcosθ...

Homework Statement Find the points on the given curve where the tangent is horizontal or vertical Homework Equations r = 3cos(θ) The Attempt at a Solution d/dθ = -3sin(θ) for horizontal: -3sin(θ)sin(θ) + 3cos(θ)cos(θ) I used identity and got: 3cos(2θ) = 0 I got the...

Find the points of intersection of $\rho=\cos\left({2\theta}\right)$ and $\rho=\cos\left({\theta}\right)$ By setting $\cos\left({2\theta}\right)=\cos\left({\theta}\right)$, we get the solutions $\theta=0,\frac{2\pi}{3},\frac{4\pi}{3}$. My question is how come that doesn't give us all the...

Homework Statement Given the two polar equations r=5-3cos(θ) and r=5-2sin(θ) find the area of the region common to both curves. Homework Equations A= 1/2∫ r^2 dθ The Attempt at a Solution i understand that i plug in the two equations into the equation, but i don't know how to find the...

1. Find the area of the region described: a) inside one loop of the lemniscate r^2=4cos(2theta) b) inside the six-petaled rose r^2=2sin(3theta) [b]2. A=integral [1/2 r^2 dtheta] Are there any easy ways to determine the integration bounds? (without graphing) Our textbook doesn't give any...

Hey, everyone. I'm new to the forums and am hoping that someone can help me with a tricky problem from my multivariable calculus class. We're covering double integrals in polar coordinate systems, and there's a problem from my problem set for homework that I can't seem to get the grasp of. The...

Homework Statement I have to find all of the points of intersection of the curves... r2 = sin(2θ) r2 = cos(2θ) The Attempt at a Solution sin(2θ) = cos(2θ) 2sinθcosθ = cos2θ - sin2θ 2sinθcosθ - cos2θ = -sin2θ cosθ(2sinθ - cosθ) = -sin2θ This is where I'm having a problem, I'm...

Homework Statement I have to find the area of the region that lies inside the curves: r = sin(θ) r = sin(2θ) The Attempt at a Solution I'm assuming the first step would be to find the points of intersection so I know WHERE to integrate from/to, so I set the equations equal to each...

for this problem, I've been given the vertices of the hyperbola as (4, pi/2) and (-1, 3pi/2). the question asks to find the polar equation of this hyperbola. so what i did was do a quick sketch of the graph. (4, pi/2) is essentially (0,4) and (-1, 3pi/2) is essentially (0,1). the midpoint of...

changing polar equations to rectangular equations? Can somebody please explain to me, how I would convert: ?=?/2 into a rectangular equation? Along with: r=sin?, r=6cos+sin?, r(squared)sin2?=2 Your help would be greatly appreciated!

I've been having a problem finding the intersection points of the following polar equations. r=1+3sin(theta) and r=1-3cos(theta) Now I've set the equations equal to each other to obtain those points. I've set each equation equal to zero. The problem I'm having is that when graphed...

It's my first time here so I guess I have to introduce myself first. I am a junior in high school taking Calculus BC and Physics B (taking Physics C next year). Currently, as of September 29, 2008, my class is learning of Polar equations. We just went over basics but I am not perfectly...

Homework Statement (theta)= 45Degrees Homework Equations (theta)= Arctan(y/x) (x>0) (theta)= Arctan(y/x) (x<0) The Attempt at a Solution Tan(45)=y/x 1 = y/x Does that mean Y = X? :confused:

Anyone know enough about TI-83s to help me out? For some reason whenever I try to graph a polar equation on mine it gives me what the graph should look like for radians when degrees is the mode of choice and vice versa. For example, if I were to graph sin(theta) I get a nice pretty circle when...

Can anyone point me to some online resources on how to integrate polar equations? Thanks.