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

          f.h : The function and the derivative.

 f___A.h   : ***** SAVE THIS FILE AS "f.h" TO WORK WITH THE A FILES *****
 ca03A1.c  : Draw    the tangent.
 ca03A2.c  : Animate the tangent.
 ca03A3.c  : Find the intersection points of the tangent with the x-y axis.
 ca03A4.c  : Find PA, the length of the tangent from P to the x axis.
 ca03A5.c  : Find PB, the length of the tangent from P to the y axis.
 ca03A6.c  : Find AM, the length of the under tangent.

 f___B.h   : ***** SAVE THIS FILE AS "f.h" TO WORK WITH THE B FILES *****
 ca03B1.c  : Draw    the tangent.
 ca03B2.c  : Animate the tangent.
 ca03B3.c  : Find the intersection points of the tangent with the x-y axis.
 ca03B4.c  : Find PA, the length of the tangent from P to the x axis.
 ca03B5.c  : Find PB, the length of the tangent from P to the y axis.
 ca03B6.c  : Find AM, the length of the under tangent.

 f___C.h   : ***** SAVE THIS FILE AS "f.h" TO WORK WITH THE C FILES *****
 ca03C1.c  : Draw    the tangent.
 ca03C2.c  : Animate the tangent.
 ca03C3.c  : Find the intersection points of the tangent with the x-y axis.
 ca03C4.c  : Find PA, the length of the tangent from P to the x axis.
 ca03C5.c  : Find PB, the length of the tangent from P to the y axis.

 f___D.h   : ***** SAVE THIS FILE AS "f.h" TO WORK WITH THE D FILES *****
 ca03D1.c  : Draw    the tangent.
 ca03D2.c  : Animate the tangent.
 ca03D3.c  : Find the intersection points of the tangent with the x-y axis.
 ca03D4.c  : Find PA, the length of the tangent from P to the x axis.
 ca03D5.c  : Find PB, the length of the tangent from P to the y axis.
 ca03D6.c  : Find AM, the length of the under tangent.   
 