- #1
goomer
- 31
- 0
Find the curvature of the plane curve given by r(t) = (3cost)i + (3sint)j at the point (√(2), √(7) ).
I know that κ=|r'(t) x r"(t)| / |r'(t)|^3
However, I believe that you are not allowed to do cross product unless there is an x, y, and z component and this question only has an x and y component.
In this case, am I supposed to use κ= |T'(t)/r'(t)| instead or use another formula all together?
I know that κ=|r'(t) x r"(t)| / |r'(t)|^3
However, I believe that you are not allowed to do cross product unless there is an x, y, and z component and this question only has an x and y component.
In this case, am I supposed to use κ= |T'(t)/r'(t)| instead or use another formula all together?
