How to Determine the Amplitude and Period of a Graph

The video tutorial explains how to determine the amplitude and period of a trigonometric function. It uses the example of y = -3/2 * cos(πx/2) to illustrate the process. The amplitude is found by taking the absolute value of the coefficient of the cosine function, resulting in 3/2. The period is calculated by considering the coefficient of x, which involves dividing 2π by π/2, simplifying to a period of 4. The tutorial emphasizes understanding the impact of each parameter on the graph of the function.

What is the significance of the absolute value of 'a' in determining the amplitude?

Explain how the coefficient of X affects the period of a trigonometric function.