Question

For f(x) = cos x, find f (50)(x)

Answer 1

Does that mean the 50th derivative?

Find f'(x), f"(x), \(f^{[3]}(x), \;and\;f^{[4]}(x)\). See if you can establish a pattern.

Answer 2

holly crap, 50th derivative ?

Answer 3

I think it is supposed to be just f(50)

Answer 4

Maybe. OP?

Answer 5

@harpellethak , you are allowed to reply to the thread, in fact you must. It is your question.