# Graphical Representation

The six trigonometric functions are represented graphically in the following images. The amplitude is on the y axis and the angle is on the x axis, in degrees. Often the angle is also represented in radians.

We have to keep in mind that these graphs are independent of time. The only independent variable is angle. They are actually a “photograph” in time of the known harmonic variable magnitudes.

For better visualization, two periods of each function are presented.

**Image 1: Sine**

**Image 2: Cosine**

**Image 3: Tangent**

**Image 4: Secant**

**Image 5: Cosecant**

**Image 6: Cotangent**