Derivation of sine
Task
Create an applet with the sine function and graph its derivative through the slope of the tangent in each point.
Explore the construction...
- Move point A along the function graph and make a conjecture about the shape of the path of point S, which corresponds to the slope function.
- Turn on the
trace of point S. Move point A to check your conjecture. Hint: Right-click point S (MacOS: Ctrl-click, tablet: long tap) and select
Show Trace.
- Find the equation of the resulting slope function and enter it into the Input Bar using g(x) = ... . Move point A along the graph of function f. If your prediction is correct, the trace of point S will match the graph of your function g.
Instructions
1. | ![]() | Enter the function f(x) = sin(x) . |
![]() | Right-Click on the ![]() | |
2. | ![]() | Create a new point A on function f. Hint: Point A can only be moved along the function. |
3. | ![]() | Create tangent g to function f through point A. |
4. | ![]() | Create the slope of tangent g using the Slope tool. |
5. | ![]() | Define point S = (x(A), m) .
Hint: x(A) gives you the x-coordinate of point A. |
6. | ![]() | Connect points A and S using a segment. |
7. | ![]() | Turn on the trace of point S. Hint: Right-click point S (MacOS: Ctrl-click, tablet: long click) and select Show Trace. |
8. | Right-click (MacOS: Ctrl-click, tablet: long click) point A and choose Animation from the appearing context menu.
Hint: An Animation button appears in the lower left corner of the ![]() ![]() ![]() |