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anonymous
 one year ago
Is there a way to tell if an equation is a cardioid or a limacon without graphing it? I'm supposed to tell what shape r=2+2sin theta is, but cardioid and limacon equations look the same. I know cardioids come from limacons, so maybe I should say that.
anonymous
 one year ago
Is there a way to tell if an equation is a cardioid or a limacon without graphing it? I'm supposed to tell what shape r=2+2sin theta is, but cardioid and limacon equations look the same. I know cardioids come from limacons, so maybe I should say that.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Astrophysics if you aren't busy, can you help me?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Ashleyisakitty @satellite73 @jim_thompson5910 @TheSmartOne @Nnesha @Loser66 @wio @sammixboo @kropot72

Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.2Not quite, you need to know what the equations look like, cardoids are as the following \[r = a \pm a \cos \theta~~~\text{and}~~~r = a \pm a \sin \theta\] dw:1434418408816:dw see if you can figure out these graphs. And limacons are in the following form \[r = b+a \cos \theta~~~\text{and}~~~r = b + a \sin \theta\] horizontal and vertical respectively. And they can be looped, if b<a, dimpled a<b<2a, and in a convex form if 2a less than equal to b. Notice that if a = b, then it's a cardioid.

Astrophysics
 one year ago
Best ResponseYou've already chosen the best response.2Notice that, one of the graphs is your equation!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yup!, the second one
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