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musicdramalife00
Group Title
write each polar equation in rectangular form:
r=3sec(Theta)
r=costheta+sintheta
r=5/3costheta+8sin
 10 months ago
 10 months ago
musicdramalife00 Group Title
write each polar equation in rectangular form: r=3sec(Theta) r=costheta+sintheta r=5/3costheta+8sin
 10 months ago
 10 months ago

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musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
^theta after the last sin
 10 months ago

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

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

myininaya Group TitleBest ResponseYou've already chosen the best response.1
We want the equations just in terms of x and y instead of r and theta.
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
i don't know what i did wrong
 10 months ago

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

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
no uh (5)/(3costheta+8sintheta)
 10 months ago

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

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
mhm 5 / (3cos+8sin)
 10 months ago

myininaya Group TitleBest 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
 10 months ago

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

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
3xr+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
 10 months ago

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

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
whoops how about the secant one
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
put it in terms of cos by using an identity
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
then put it in some form where you can use the equations I gave you
 10 months ago

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

myininaya Group TitleBest ResponseYou've already chosen the best response.1
for the first one? no...
 10 months ago

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

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

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
yep
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Notice 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
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
multiply both sides with r
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
try again
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
How do you undo multiplication?
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Or division?
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
oh omg
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
we have division by cos to undo that you ?
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
x=3
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
thanks
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
so for that second one...
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
you actually got it right
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
but how did you go about it you didn't choose a complicated way right?
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
yep uh multiplied both side with r and then substituted the stuff in
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
oh good
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
do you have any other questions? do you think you got this better?
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
uh yea i have a few more
 10 months ago

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

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Plug in values of theta and see what the r output is
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
then 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
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
like how would you do this with a graphing calculator
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
So 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
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
find 0 degrees and then go to the circle with radius 2
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
cause wksht says not to use a table
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
dw:1388269927627:dw then plug in more points
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
oh i know how to graph but not without plugging in points
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
I haven't looked at a calculator in ages
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
did you try looking up how to input polar equations into whatever calculator type you have
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
some calculators require a difference procedure in order to do certain things
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
http://mathbits.com/MathBits/TISection/PreCalculus/polargraphs.htm
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
find mode and choose polar or pol or polargc
 10 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
then just type your equation in
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
u what's the website
 10 months ago

musicdramalife00 Group TitleBest ResponseYou've already chosen the best response.0
*uh
 10 months ago
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