Graphs of Trigonometric Functions
Maths: Edexcel A Level Pure Maths, topic 5.2.5
Trigonometric Functions
To sketch trigonometric graphs (y = sin(x), y = cos(x), y = tan(x)) use x values which are multiples of 90° since these are the important points on the graph.
Tangent
- tan(x) repeats every 180°
- There are vertical lines at 90°, 270°, ... because the function is undefined at these points.
sin(x)
- sin(x) repeats every 360°.
sin(x) and cos(x)
- cos(x) also repeats every 360°.
- They have the same wave shape but the cosine graph is shifted by 90° compared to the sine graph.
Test yourself on Graphs of Trigonometric Functions
What type of graph is this?
What type of graph is this?
What type of graph is this?