Having the polar and parametric equations of a cardioid :
rho=2*cos(phi) + 3

x=rho*cos(phi)
y=rho*sin(phi)

find a way of rotating the cardioid 180° and 270° anticlockwise , modifing the original equations.

Help me please!

Question

Having the polar and parametric equations of a cardioid : 
rho=2*cos(phi) + 3

x=rho*cos(phi)
y=rho*sin(phi)

find a way of rotating the cardioid 180° and 270° anticlockwise , modifing the original equations.

Help me please!

anonymous · Answer

Yes, its hard :(

anonymous · Answer

@Zarkon

sasogeek · Answer

24 days seems like a long wait lol :) you have patience :)

anonymous · Answer

switching x and y for 270 would work by sheer luck?

kinggeorge · Answer

I believe that using $\varphi+\theta$ where $\theta$ is 180$^\circ$ or 270$^\circ$ counterclockwise would work.

kinggeorge · Answer

And $\theta$ must be in radians.

anonymous · Answer

I know if I change rho=2*cos (phi) +3  to  rho=2*sin(phi) + 3 , it turns 90° anticlockwise, I will check if rho=2*sin(phi + 3/2pi) + 3 works...

kinggeorge · Answer

After checking it myself, I think you need to use pi/2 instead of 3pi/2.

anonymous · Answer

I will check ;)

anonymous · Answer

THAKS TO EVERYONE!!

anonymous · Answer

THANKS
JAJA