Final answer:
The maximum value of y = cos(e) for values of e between -720º and 720º is 1.
Step-by-step explanation:
The maximum value of y = cos(e) for values of e between -720º and 720º can be found by understanding the behavior of the cosine function. The cosine function oscillates between -1 and 1 as the angle increases or decreases. The maximum value of cosine occurs at an angle of 0 degrees (or 360 degrees, 720 degrees, etc.). Therefore, the maximum value of y = cos(e) is 1.