The cosine function is **y = cos(x)**.

The graph of the function is a cosinusoid. This is a curve that repeats at certain points, that is, the graph has a period. The period of the function T= 2π. The graph starts at the point (0;1). The scope is all valid numbers. The value domain is [-1;1].

Example cosin function graph:

**y = cos(x)**

**y = -cos(x)**– the chart is shown horizontally

**y = cos(2x)**– the graph is “compressed” and the period is defined as T= π

**y = cos(1/2x)**– graph “expands” period – T= 4π

**y = cos(x)+2**– the graph is shifted along the Y axis by 2 steps

**y = cos(x+2)**– the graph is shifted along the x-axis by 2 steps

All graphics are built with our **graphical calculator**