1.Find the length of the polar curve given by on the interval .
I know how to do it with x and y, but what to do with this one?
Also same problem with this question
2.For what values of on the polar curve , with , are the tangent lines horizontal? Vertical?
Isn't just tangent=0 and tangent=1?
2. vertical tangent lines occur where is undefined
horizontal tangent lines occur where equals zero
So I got theta=tantheta when horizontal tangent occur
and theta=cotangent theta when vertical tangent occur. Then How to calculate them?