Although units of are convenient, we must remember that is only a number. Numbers that

Although units of π are convenient, we must remember that π is only a number. Numbers that are not multiples of π may be used. In Exercises plot the indicated graphs by finding the values of y that correspond to values of x of 0, 1, 2, 3, 4, 5, 6, and 7 on a calculator. (Remember, the numbers 0, 1, 2, and so on represent radian measure.)

y = 2 cos x