Posted by **Elena** on Friday, April 22, 2011 at 5:27pm.

find the derivative:

d/dx int_a to x (a being the upper limit) of tan(tan(t))dt

- Calculus -
**Damon**, Friday, April 22, 2011 at 6:09pm
Graph a function(any function) from a to x.

I think you mean a is the lower limit and x the upper, but whatever:

The question is what is the change of area under that function for a small change in the upper limit x of dx?

It is in fact the value of the function at x times dx

and d/dx of that is just the value of the function at x

tan [tan(x)]

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