Trigonometric graphs

The sine and cosine graphs

The sine and cosine graphs are very similar as they both:

  • have the same curve only shifted along the x-axis
  • have an amplitude (half the distance between the maximum and minimum values) of 1
  • have a period (size of one wave) of 360˚

Diagram of sine graph

Diagram of a cos graph

Diagram of a sin and cos graph

The tangent curve

The tangent graph:

  • has an amplitude which is undefined as the curve tends to infinity both upwards and downwards
  • has a period of 180˚

Diagram of a tangent curve graph