5.1 GRAPHING SINE AND COSINE FUNCTIONS
Periodic Functions• Sine and cosine functions are periodic functions. The
values of these functions repeat over a specified period.• The shape of a sine graph is a sinusoidal curve.
Graphing the Sine FunctionThe sine function, y = sin !, relates the measure of angle ! in standard position to the y-coordinate of the point P where the terminal arm of the angle intersects the unit circle.
The Cosine FunctionThe cosine function, y = cos !, relates the measure of angle ! in standard position to the x-coordinate of the point P where the terminal arm of the angle intersects the unit circle.
Graphing the Cosine FunctionThe cosine function, y = cos !, relates the measure of angle ! in standard position to the x-coordinate of the point P where the terminal arm of the angle intersects the unit circle.
a = 3
a = Max - min2
= 5- (-1)2
a = 3