Lukecrayonz
  • Lukecrayonz
Mathematics
katieb
  • katieb
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Lukecrayonz
  • Lukecrayonz
We just did this, but the assignment got reset for some reason, so we are going to have to do the same type of problems again, wanna help again?
anonymous
  • anonymous
Luke... I am your father...
anonymous
  • anonymous
fire away...

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Lukecrayonz
  • Lukecrayonz
@dpaInc Name the polar symmetry of the graph with the polar equation r=2+2costheta
anonymous
  • anonymous
we gotta test for symmetry... about polar axis... change the theta to -theta...
anonymous
  • anonymous
about the origin... change the r to -r
Lukecrayonz
  • Lukecrayonz
So when you change it and nothing happens, that means..
anonymous
  • anonymous
it's symmetrical if the equation is the same...
anonymous
  • anonymous
i forgot... 1 more
anonymous
  • anonymous
about the vertical line theta = pi/2, change theta to pi-theta
Lukecrayonz
  • Lukecrayonz
Pi/theta? Or pi minus theta?
anonymous
  • anonymous
for the last one, change theta to pi-theta this checks for symmetry about the vetical line through the pole.
anonymous
  • anonymous
cosine is even so cos(theta) = cos(-theta)
anonymous
  • anonymous
HINT^^
anonymous
  • anonymous
got an answer?
Lukecrayonz
  • Lukecrayonz
Yes :D
anonymous
  • anonymous
it's symmetric about the.....
Lukecrayonz
  • Lukecrayonz
Polar axis: Symmetrical Origin: Not symmetrical Vertical line through the pole: Not symmetrical
anonymous
  • anonymous
very good my son....
anonymous
  • anonymous
go now and teach the ways of the force to others....
Lukecrayonz
  • Lukecrayonz
More questions though.

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