# The trigonometric functions sine and cosine

- Author:
- Pär Sandström

- Topic:
- Cosine, Functions, Sine, Trigonometric Functions

Get acquainted with the trigonometric functions of sinus and cosinus!
Drag the sliders to change amplitude, period and phase and try to develop a feeling for how these parameters determines the function graph.
Start with sinus, then add cosinus and then play around with the sum of them.
Use SHIFT or CTRL and the mouse wheel to zoom in and out and to change the scale of the cordinate system.

1. Set the parameters so the graph shows a sine-function with period and amplitude 0,5
2. Try to make the sine-function (red) and the cosine-function (blue) to look exactly the same. What is the difference between sine and cosine?