Definition:Equiangular Spiral/Mistake

Source Work

 * equiangular spiral
 * equiangular spiral

Mistake

 * ''The equation can be written $r = k \theta + b$

Correction
This should read:


 * ''The equation can be written $\ln r = k \theta + b$

In the $6$th edition, the expression has been corrected to:
 * $r = a e^{k \theta}$

which is an equivalent form.