# List of functions used for tangent/normal 2D.
# An item in this list will be picked randomly at each exercise.
# Structure of item: multi-line.
# line 1 is function description.
# line 2 is derivative.
# line 3 is proportionality
# The rest is values for parameters c1, c2, etc.

:c2*sin(c1*t)
 c2*(c1)*cos(c1*t)
 1.5
 1,2,3,4,5
 1.8,2,2.2,2.5,2.7,3,3.5,4
:c2*cos(c1*t)
 -(c2)*(c1)*sin(c1*t)
 1.5
 1,2,3,4,5
 1.8,2,2.2,2.5,2.7,3,3.5,4
:c2*sin(c1*t)+c3
 c2*(c1)*cos(c1*t)
 1.5
 1,2,3
 1.8,2,2.2,2.5,2.7,3
 1,2,3,4
:c2*cos(c1*t)+c3
 -(c2)*(c1)*sin(c1*t)
 1.5
 1,2,3
 1.8,2,2.2,2.5,2.7,3
 1,2,3,4
:c1*exp(c2*t)+c3
 c1*(c2)*exp(c2*t)
 1.5
 0.3,0.4,0.5,0.6,0.7,0.8,1.2
 -1,-0.8,-0.7,-0.5,-0.4,-0.3,0.3,0.4,0.5,0.6
 0.2,0.3,0.5,0.7,0.8,1.1,1.3,1.5,1.7,2
 

