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3.1 Periodic Phenomena
3.2 Sine, Cosine, and Tangent
3.3 Sine and Cosine Function Values
3.4 Sine and Cosine Function Graphs

In this video, I thoroughly describe and reteach the main components of the sections listed above found in the official College Board AP Precalculus course description found at https://apcentral.collegeboard.org/me.... Afterwords, I provide multiple examples and give descriptive solutions to AP Precalculus-style problems. Topics in this video include…

3.1 Periodic Phenomena:
Periodic phenomena refer to events or processes that repeat at regular intervals. In precalculus, this concept is often applied to functions that exhibit periodic behavior. These functions repeat their values over a specific interval. Examples include trigonometric functions like sine and cosine, which are fundamental to understanding periodicity in mathematics.

3.2 Sine, Cosine, and Tangent:
Sine, cosine, and tangent are trigonometric functions that are essential in precalculus and trigonometry. They are defined in relation to the angles of a right triangle. In a right triangle, the sine of an angle is the ratio of the length of the side opposite the angle to the hypotenuse. Similarly, cosine is the ratio of the adjacent side to the hypotenuse, and tangent is the ratio of the opposite side to the adjacent side.

3.3 Sine and Cosine Function Values:
This topic involves understanding and calculating the values of sine and cosine functions for different angles. Students learn how to use the unit circle and trigonometric ratios to find the exact values of sine and cosine for standard angles. The unit circle provides a geometric interpretation of these values, helping to establish the connection between trigonometry and geometry.

3.4 Sine and Cosine Function Graphs:
Graphing sine and cosine functions is a crucial skill in precalculus. These functions produce periodic graphs that repeat over a certain interval. Students learn to understand the amplitude, period, and phase shift of these functions and how they affect the shape of the graph. Graphing tools, such as the unit circle, help visualize the behavior of sine and cosine functions.

In summary, these precalculus topics cover the fundamentals of periodic phenomena, trigonometric functions (sine, cosine, tangent), and the graphing of sine and cosine functions. Understanding these concepts is essential for further studies in calculus and applications in various fields.

I have many informative videos for Pre-Algebra, Algebra 1, Algebra 2, Geometry, Pre-Calculus, and Calculus. Please check it out:    / nickperich  

Nick Perich
Norristown Area High School
Norristown Area School District
Norristown, Pa
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