- #1
julz3216
- 18
- 0
Homework Statement
Consider the following position function.
r(t)= et(cos(t)i+sin(t)j+7tk)
Find the speed of a particle with the given position function.
Homework Equations
I know I take the derivative of the function but I can't seem to get speed.
I got v=e^t(cos(t)i+sin(t)j+7(t)k)+ e^t(-sin(t)i+cos(t)j+7k)
The Attempt at a Solution
I just can't find the speed, i think i may be just slightly off. I currently have speed is 7e^t(t+1) which is wrong.