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 |

