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anonymous
 5 years ago
convert to polar form. x^2=8y
anonymous
 5 years ago
convert to polar form. x^2=8y

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x=rcos(theta) y=rsin(theta)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0r^2cos^2(theta)=8rsin(theta)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so its r=8sin(theta)/cos^2(theta)?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so the answer is in r= form when there are no set points. But with set points you write it as (r, theta) ?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I don't know what you mean by set points. In polar form there is a magnitude and a direction/angle.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and i'd rather not write up a new question for these, but im also struggling the other way around. converting polar to rectangular. 1) r^2*cos(2theta)=1 2)r=2cos(theta)4sin(theta) think you can help out?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0by set points in meant (1,4) or something to that extent. I was able to answer that though.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0when you run into something with a coefficient of theta use your trig identities to get rid of it so you can use x=rcos(theta) y=rsin(theta) to convert back to rectangular.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0actually i have 2. and what trig identity would i use here? cos(2A) = cos²A − sin² ?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0im not sure how this applies if i have r^2 * cos(2*theta)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0cos(theta/2)= sqrt((1+cos(theta))/2)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0actually you were right, you don't use the half angle...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you use the one that matches, double angle.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0there are 3 for cosine, i cant tell which one would work in this scenario

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0cos(2a)=cos^2*a)+sin^2(a)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0when you put that one in you'll end up with two terms both multiplied by r^2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0then you can simply substitute them for x^2 and y^2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so I'm at r^2cos^2(theta) r^2sin^2(theta)=1. which turns to x^2y^2=1...and thats the answer on the sheet. Got it, thanks!
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