A community for students.
Here's the question you clicked on:
 0 viewing
musicdramalife00
 2 years ago
write each polar equation in rectangular form:
r=3sec(Theta)
r=costheta+sintheta
r=5/3costheta+8sin
musicdramalife00
 2 years ago
write each polar equation in rectangular form: r=3sec(Theta) r=costheta+sintheta r=5/3costheta+8sin

This Question is Closed

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0^theta after the last sin

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1You need to use these equations: \[r^2=x^2+y^2 ; rcos(\theta)=x ; rsin(\theta)=y \]

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0i did, but like it ended up like x^2+y^2= 25+9x^2r^230xr/64y^2 for the last one

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1We want the equations just in terms of x and y instead of r and theta.

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0i don't know what i did wrong

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1so the last one is: \[r=\frac{5}{3}\cos(\theta)+8\sin(\theta) \]?

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0no uh (5)/(3costheta+8sintheta)

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1oh so you meant 5/(3costheta)+8sin(theta)) and not 5/3cos(theta)+8sin(theta)

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0mhm 5 / (3cos+8sin)

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1\[r= \frac{5}{3\cos(\theta)+8\sin(\theta)}\] Multiply both sides by that one fraction's denominator

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1\[r(3\cos(\theta)+8\sin(\theta))=5 \] Distribute then substitute the equations I gave you

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.03xr+8ry=5 but then you'll need to put r on one side cause you would need to square it. and the answer comes out all weird

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1well rcos(theta) is x not just cos(theta same thing with the y deal rsin(theta) is y not just sin(theta)

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0whoops how about the secant one

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1put it in terms of cos by using an identity

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1then put it in some form where you can use the equations I gave you

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0sosoososososo it would be x^3+y^2x=3 AND uh the other one x^2+y^2=x+y?

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1for the first one? no...

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1I haven't looked at the second one... You are making this way too hard it looks like.

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1first one you did this as first step right?: \[r=\frac{3}{\cos(\theta)}\]

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1Notice this only has a cos in it... how do you get cos with the r over there so you can use the equation rcos(theta)=x

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0multiply both sides with r

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1How do you undo multiplication?

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1we have division by cos to undo that you ?

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1so for that second one...

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1you actually got it right

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1but how did you go about it you didn't choose a complicated way right?

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0yep uh multiplied both side with r and then substituted the stuff in

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1do you have any other questions? do you think you got this better?

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0uh yea i have a few more

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0for standard forms of polar equation uh how would graph r=2cos3theta

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1Plug in values of theta and see what the r output is

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1then remember how you graph using polar coordinates r is the distance from the origin and direction is given by r to from the angle theta is the angle

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0like how would you do this with a graphing calculator

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1So for example if I plug in theta=0 \[r=2 \cos (3 \cdot 0)=2\cos(0)=2(1)=2 => \text{ graph the point } (2,0^o)\] dw:1388269865874:dw

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1find 0 degrees and then go to the circle with radius 2

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0cause wksht says not to use a table

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1dw:1388269927627:dw then plug in more points

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0oh i know how to graph but not without plugging in points

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1I haven't looked at a calculator in ages

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1did you try looking up how to input polar equations into whatever calculator type you have

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1some calculators require a difference procedure in order to do certain things

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1http://mathbits.com/MathBits/TISection/PreCalculus/polargraphs.htm

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1find mode and choose polar or pol or polargc

myininaya
 2 years ago
Best ResponseYou've already chosen the best response.1then just type your equation in

musicdramalife00
 2 years ago
Best ResponseYou've already chosen the best response.0u what's the website
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.