- What is this video about?
This video explains some differences between each trigonometric functions. Part 1 will show how the period for sine and cosine is 2pi, whereas the period for tangent and cotangent is pi. Part 2 is about how sine and cosine have amplitudes of one. The video explains why the other trigonometric functions do not have an amplitude.
- What does the viewer need to pay special attention to in order to understand the concept?
The readers should see the graphs of sine and cosine are different from the starting at 0. But they share similarities in the way that the graphs look like waves and have amplitudes. Each graph might look similar to the others but they actually differ.
This graph shows both cosine and sine graphs and their amplitudes.
A good source for amplitudes: http://www.purplemath.com/modules/grphtrig.htm
It fully explains how amplitude affects the graph by giving out some examples and an image of the graph.
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