Differentiate, but do not simplify: f(x)=cos(x)/x

[ttpp1124]

Homework Statement

can someone check to see if my work is correct?

Relevant Equations

n/a

 

[etotheipi]

Yes, but make your minuses $-$ and dots $\cdot$ clearer. They look the same in your answer.

 

[member 587159]

I think it is time to learn Latex, don't you agree?

 

[robphy]

https://www.desmos.com/calculator/ml5rneigun

This is fun and useful.
You should try it.