find-d-n-dx-n-ln-cosx-

Question Number 167402 by mkam last updated on 15/Mar/22

$$\boldsymbol{{find}}\:\frac{\boldsymbol{{d}}^{\boldsymbol{{n}}} }{\boldsymbol{{dx}}^{\boldsymbol{{n}}} }\:\left[\:\boldsymbol{{ln}}\:\left(\boldsymbol{{cosx}}\right)\:\right] \\ $$

Commented by DrHZ last updated on 15/Mar/22

I think this is wrong!

Commented by mkam last updated on 16/Mar/22

$${why}\:? \\ $$

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