freeware http://groups.yahoo.com/group/mathc/

* Calculus : Derivative Tangent.

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Windows : Dev-C++ 4
Linux : gcc abc.c -lm Return
a.out Return

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* You can compile the *.c files directly without create a project.

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c03a1A.c : Draw the tangent.
c03a1B.c : Animate the tangent.
c03a1C.c : Find the intersection points of the tangent with the x-y
axis.
c03a1D.c : Find PA, the length of the tangent from P to the x axis.
c03a1E.c : Find PB, the length of the tangent from P to the y axis.
c03a1F.c : Find AM, the length of the under tangent.


c03a2A.c : Draw the tangent.
c03a2B.c : Animate the tangent.
c03a2C.c : Find the intersection points of the tangent with the x-y
axis.
c03a2D.c : Find PA, the length of the tangent from P to the x axis.
c03a2E.c : Find PB, the length of the tangent from P to the y axis.
c03a2F.c : Find AM, the length of the under tangent.


c03a3A.c : Draw the tangent.
c03a3B.c : Animate the tangent.
c03a3C.c : Find the intersection points of the tangent with the x-y
axis.
c03a3D.c : Find PA, the length of the tangent from P to the x axis.
c03a3E.c : Find PB, the length of the tangent from P to the y axis.
c03a3F.c : Find AM, the length of the under tangent.


c03a4A.c : Draw the tangent.
c03a4B.c : Animate the tangent.
c03a4C.c : Find the intersection points of the tangent with the x-y
axis.
c03a4D.c : Find PA, the length of the tangent from P to the x axis.
c03a4E.c : Find PB, the length of the tangent from P to the y axis.
c03a4F.c : Find AM, the length of the under tangent.

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The members can try these links :

http://groups.yahoo.com/group/mathc/files/C/D/c03a.zip