## Trigonometry: Graphs

Here I show you how the graphs of sin θ and cos θ can be thought of as projections of the unit circle and also how to draw the graph of tan θ. I also look at some of their properties.

In this section I show you translations of the trigonometric graphs of f(x) = sin(x), cos(x) and tan(x) relative to the y-axis and then the x-axis.

## Translations parallel to the y-axis:

You should already be familiar with the transformation y = f(x) ± a

## Translations parallel to the x-axis:

You should already be familiar with the transformation y = f(x ± a)

In this section I show you reflections of the trigonometric graphs of f(x) = sin(x), cos(x) and tan(x).

## Reflection in the x-axis:

You should already be familiar with the transformation y = – f(x)

## Reflection in the y-axis:

You should already be familiar with the transformation y = f(-x)