1. Advanced Math-Honors Graphing Sine and Cosine

2. General Graphs Graphs are collections of points Independent variables are related to dependent variables Domain is set of independent variable values Range is set of dependent variable values

3. Periodic Graphs Graphs that repeat infinitely in intervals are called periodic Ex: Sea level as a function of time The most common periodic graphs are the graphs of the trigonometric functions Sine, cosine, tangent, cosecant, secant, and cotangent

4. The Sine Graph Oscillation-one complete “cycle” of the graph Period-”time” (horizontal distance) it takes the graph to complete one oscillation Amplitude-the furthest vertical distance the graph ventures from the vertical center

5. The Sine Graph We think of the sine graph as starting at an x-value of zero It begins at a y-value of zero It then moves up the distance of its amplitude Next it moves back down to the x-axis Then it moves down the distance of its amplitude The it completes an oscillation by moving back up the x-axis

6. The Sine Graph The period of the sine graph is… So the horizontal length of each “piece” of the sine graph is… The amplitude of the sine graph is…(think about the values of sine)

7. The Cosine Graph The cosine graph is the same as the sine graph, only it has been shifted horizontally Same period Same amplitude

8. The Cosine Graph Same period Same amplitude The “starting point” is still an x-value of zero, but is now a y-value of 1

9. Sine and Cosine Graphs While the idea of a “starting point” is very helpful when graphing, it is merely an idea These graphs have infinite domains We have thus far only looked at library versions. There will be transformations.