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# Differentiate Multi-Input Functions?

calculus differentiate functions multiple input how to

2 replies to this topic

### #1 RhetoricalRuvim

RhetoricalRuvim

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Posted 02 April 2012 - 05:09 PM

Okay, so I have a function that I want to differentiate (find the derivative of), but it's not a function type that they taught us how to differentiate in math, so I'm not sure about how I would do that.

Here's the function:
`x(u, v)= a * cos (u) * sin (v)`

The thing is, it has multiple inputs. Do I just do dxduv instead of dxdu or dxdv (though people usually call them dx/du or dx/dv instead; I just don't like drawing that line between the dx and du, etc., so I write it that way)? How would I find the derivative of that function?

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Regards,
RR

### #2 Orjan

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Posted 02 April 2012 - 05:33 PM

http://en.wikipedia....tial_derivative

Hope that page can help! It ain't that easy as I can see it.
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### #3 Fiction

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Posted 04 April 2012 - 05:38 PM

If the wiki steps aren't enough, just plug it into wolframalpha and click show steps.
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### Also tagged with one or more of these keywords: calculus, differentiate, functions, multiple input, how to

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