standard_description: Explain how the unit circle in the coordinate plane enables the extension of trigonometric functions to all real numbers, interpreted as radian measures of angles traversed counterclockwise around the unit circle.
problem_activity: Task
The figure below gives the depth of the water at Montauk
Point, New York, for a day in November.
[IMG]
How many high tides took place on this day?
How many low tides took place on this day?
How much time elapsed in between high tides?


aligns: no