The question is:
Consider $ \mathbb{R^2} $ with the usual metric and let
$E = \{ (t, \sin t) : t > 0 \} $ . Identify $E'$ explicitly.
Thank you so much !
The question is:
Consider $ \mathbb{R^2} $ with the usual metric and let
$E = \{ (t, \sin t) : t > 0 \} $ . Identify $E'$ explicitly.
Thank you so much !
$R'$ contains all points $(x,y)\in\mathbb R^2$ that are not of the form $(t,\sin t)$ for some $t>0$. That is $ E'=\{(x,y)\in\mathbb R^2\mid x\le 0\lor y\ne\sin x\}.$