- #1
songoku
- 2,341
- 340
- Homework Statement
- Find the smallest value of k (where k ≥ 1) so that y = sin x and ##y=ke^{-x}## are tangent for x ≥ 0
- Relevant Equations
- Derivative
I tried to equate the derivative of the two equations:
$$\cos x=-ke^{-k}$$
Then how to continue? Is this question can be solved?
Thanks
$$\cos x=-ke^{-k}$$
Then how to continue? Is this question can be solved?
Thanks