Calculus I - Math 151
Sect. 2.1: Secant Lines Approaching Tangent Lines The red line is a tangent line fixed at some point. Watch how the secant line "approaches" the tangent line as you drag the green point closer the red point along the function (the x-coordinate of the green point is approaching the x-coordinate of the red point of tangency).
Sect. 2.2: Limits This applet may help you visualize the difference between left-limits, right-limits, and overall limits, particularly with piecewise functions. Play around with it, but do not become dependent on this to calculate limits for you!
Sect. 2.8: Sketching the graph of a derivative f '(x) given f(x) This applet can help you visualize the slopes of f(x) and how this determines the shape of f '(x). You can even do a rough sketch of what you think f '(x) will look like and compare it to the answer.
Sect. 3.9: Various Related Rates Animations
Ladder leaning against a wall and sliding downward (Top sliding down at a constant rate)
Boat being pulled toward a dock at a constant rate
Inverted cone being filled at a constant rate
Man walking towards a lamppost at a constant rate
Fish being reeled in at a constant rate
A circle with area growing at a constant rate
A lighthouse with a beam rotating at a constant rate
A triangular water trough filled at a constant rate
These animations can be found at the site: http://www2.seminolestate.edu/lvosbury/calculusI_folder/RelatedRateProblems.htm