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Oct
29
accepted 31,331,3331, 33331,333331,3333331,33333331 are prime
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asked 31,331,3331, 33331,333331,3333331,33333331 are prime
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Jul
20
comment How to find the number of intersection for $ \rho =\frac{\theta} {2\pi+1} $ and $\rho =\frac {1} {2-\cos\theta} $
$\theta $ can be negative four intersections.
Jul
20
answered How to find the number of intersection for $ \rho =\frac{\theta} {2\pi+1} $ and $\rho =\frac {1} {2-\cos\theta} $
Jul
20
comment How to find the number of intersection for $ \rho =\frac{\theta} {2\pi+1} $ and $\rho =\frac {1} {2-\cos\theta} $
I have little doubt: this formula $\cos{\theta}=2-\dfrac{2\pi+1}{\theta}$ is not equivalent subject conditions , after all, polar coordinates and Cartesian coordinate system is different than one to one.
Jul
20
awarded  Commentator
Jul
20
accepted How to find the number of intersection for $ \rho =\frac{\theta} {2\pi+1} $ and $\rho =\frac {1} {2-\cos\theta} $
Jul
20
comment How to find the number of intersection for $ \rho =\frac{\theta} {2\pi+1} $ and $\rho =\frac {1} {2-\cos\theta} $
I use computer drawing, also get four intersections. but do not know how to explain. Thank you.