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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

'A man is accepted into a church for what he believes. He is turned out for what he knows.' - Mark Twain

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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.

I never thought I'd live long enough to become a grumpy old bastard. Here I am, killing it!

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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)

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Know God, Know fear.