Question

Let f(t)=cos(t)/t
f'(t)=?

Answer 1

start with the derivative of cos - do you know what that is?

Answer 2

-sin(x)

Answer 3

good, now you just need to apply the quotient rule

Answer 4

\[\frac{ (-sint)(t)-(cost)(1) }{ t^2 }\]

Answer 5

\[\frac{ -t \sin(t)\cos(t) }{ t^2 }\]

Answer 6

okay thank you I was using the wrong formula