Скачать или смотреть Midline of Sinusoidal Functions from Equations

This video introduces finding the midline of a sinusoidal function from its equation. The sine and cosine are both sinusoidal functions.

The midline is the horizontal line that divides the function in half. It is halfway between the maximum and minimum points on the function.

The amplitude is the distance between the midline and either the maximum or minimum value of the function.

Adding to the sinusoidal function on the "outside" will shift the function either up or down vertically. The parent functions to both sine and cosine have midline equations of y = 0. To move this midline up or down, either add or subtract a constant from the sine or cosine function. For instance, y = cos(x) + 7, will shift the entire function up 7 units and the new midline equation is y = 7.

Khan Academy exercise to practice:
1. Midline of Sinusoidal Functions from Equation: https://www.khanacademy.org/math/trig...


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