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Not sure I understand basic calculus...

February 15, 2019 at 12:00 pm
I've began to study calculus on the university. I thought I understood it back in high school, but, once I got slightly deeper into it, it turned out I don't.

Here is my question, if the derivative of the inverse function is the reciprocal of the derivative of the function, and the derivative of the arctan function is 1/(1+x*x), how come the derivative of the tangent isn't 1+x*x but is instead 1/(cos(x)*cos(x))?

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RE: Not sure I understand basic calculus...

February 16, 2019 at 8:42 am
Now send grandizer a lot of hookers and blow for the help he gave you. Or a rep point if he isn't into it.

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RE: Not sure I understand basic calculus...

February 16, 2019 at 8:45 pm
(This post was last modified: February 16, 2019 at 8:45 pm by BrianSoddingBoru4.)
Quote:Not sure I understand basic calculus...

I don't have that problem. I am

completely sure I don't understand basic calculus.

Boru

‘Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.’ Ralph Waldo Emerson

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RE: Not sure I understand basic calculus...

February 16, 2019 at 9:48 pm
Just remember that for every epsilon, there is a delta. Kind of like for every scraggly horse, there is a scraggly bush. It's cleverly disguised math porn.

If you get to thinking you’re a person of some influence, try ordering somebody else’s dog around.

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RE: Not sure I understand basic calculus...

February 16, 2019 at 10:53 pm
(February 16, 2019 at 8:45 pm)BrianSoddingBoru4 Wrote: Quote:Not sure I understand basic calculus...

I don't have that problem. I am completely sure I don't understand basic calculus.

Boru

Give it a go... it's as easy as pi!

(yeah, me too)

No God, No fear.

Know God, Know fear.