**Cos 6 Pi**. Note that the cosine function is able to recognize some special angles and make the calculations with. cos(π). Enter angle in degrees or radians Enter PI for π.

The cosine function is even, which means that #cos(-x) = cos(x)#. Note that the cosine function is able to recognize some special angles and make the calculations with. cos(π). Enter angle in degrees or radians Enter PI for π.

### Note that the cosine function is able to recognize some special angles and make the calculations with. cos(π).

The cosine function is even, which means that #cos(-x) = cos(x)#.

Enter angle in degrees or radians Enter PI for π.