A community for students.
Here's the question you clicked on:
 0 viewing
lilsis76
 2 years ago
graph each point in a polar coordinate system, then convert the given polar coordinate to rectangular coordinates.
(1, pi/8)
this is all my homework is and i have other ones where i have to reverse the coordinates from recangle to polar
lilsis76
 2 years ago
graph each point in a polar coordinate system, then convert the given polar coordinate to rectangular coordinates. (1, pi/8) this is all my homework is and i have other ones where i have to reverse the coordinates from recangle to polar

This Question is Closed

freewilly922
 2 years ago
Best ResponseYou've already chosen the best response.0Polar coords give you $$(r,\theta)$$ so that on the axis you draw something like dw:1351738791260:dw you can then convert that point to an (x,y) rectangular coord. by using trig and making a triangle. $$y=\sin(\theta) \\ x = \cos(\theta) $$

freewilly922
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1351738924218:dw

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0then where does the pi/8 land? i cant find that

freewilly922
 2 years ago
Best ResponseYou've already chosen the best response.0radian notation can be converted as follows: 0pi = 0 degrees pi = 180 degrees 2pi = 360 degrees so pi/8 = 180/8 = 22.5 degrees. first quadrant

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0i didnt think about the 180 over 8

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0dang it. now im lost :/ i dont know what to do next

freewilly922
 2 years ago
Best ResponseYou've already chosen the best response.0so to get the (x,y) you use (cos(angle), sin(angle)) so for this one \[\bigg(\cos\left(\frac{\pi}{8}\right),\sin\left(\frac{\pi}{8}\right)\bigg)\]

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0well i guess since x is 1, x will be 1, does that make the y or theta thingy zero ? (0)?

freewilly922
 2 years ago
Best ResponseYou've already chosen the best response.0you need to use your calculator for this. why do you think x is 1?

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0dang it, okay its (r, theta) right? okay umm wait. i feel so stupid i dont understand anything im doing

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0well i did the calculaotor thingy u said. cos(pi/8) = the .999 and sin(pi/8)= .007

freewilly922
 2 years ago
Best ResponseYou've already chosen the best response.0your calculator may be in degree mode instead of radians. Try either switching you mode on the calculator or trying cos(180/8) and sin(180/8)

lilsis76
 2 years ago
Best ResponseYou've already chosen the best response.0dang.... :/ the back of the book says the answer is\[\sqrt{2+\sqrt{2}} /2 , \sqrt{2\sqrt{2}} /2\]
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.