If $ f(x) = \cos (\ln x^2), $ find $ f'(1). $
in this trouble. We're going perplexed as Poseidon Adventure. What expert in West? I'm very terrible like that before. So the 1st 1 Very well, dysfunction. We're gonna start on the outer bunch of Stilton. And now we're going over the infection in this guy's It is natural expert. So we had a negative sign off. Natural extra months 55 Derek. Oh, next level expert. That would be a negative sign. National of X Cried times born or expert to X. Let's put one in. He had made a sign National local four times, one over one turns to be noted nature level 40 and signed off 00 So derivative awake at this point is zero.