Ask your own question, for FREE!
Mathematics 18 Online
OpenStudy (anonymous):

give the corresponding equation in rectangular coordinates

OpenStudy (anonymous):

\[\huge \color {blue} { r=e ^{a \theta}}\]

OpenStudy (amistre64):

well, i recall that x = r cos(t), and y = r sin(t)

OpenStudy (amistre64):

that might suggest solving t in terms of x, and subbing it into y

OpenStudy (anonymous):

\[\huge \ln(r)=a \theta \text{ i wanna sketch this}\]

OpenStudy (anonymous):

\[r=e^{a \theta}\implies \ln(r)=a \theta\]

OpenStudy (anonymous):

no symmetry around any axis!!!

terenzreignz (terenzreignz):

Looks to me like you could just substitute away... after some clever manipulations, probably... \[\huge r = \sqrt{x^2+y^2}\]\[\huge \tan\theta = \frac{y}x\]

OpenStudy (anonymous):

\[\frac{1}{2}\ln(x^2+y^2)=a \tan^{-1}(\frac{ x }{ y })\]

OpenStudy (anonymous):

not looking good

terenzreignz (terenzreignz):

don't make the equation feel bad about itself :D

terenzreignz (terenzreignz):

And if that's the case, I'm out of ideas :)

OpenStudy (amistre64):

my idea was that since parametrics define the rectangular coords seperately, and since the original curve is not a "function" ....

OpenStudy (anonymous):

theres not problem in plotting|dw:1366125776988:dw|

OpenStudy (anonymous):

@amistre64 cud we use that o sketch the polar cordinates

OpenStudy (amistre64):

you could yes; not to sure what the a is in e^(a theta) im thinking its just an arbitrary constant at the moment. |dw:1366129494518:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!