Question: Although units of are convenient, we must remember that is only a number. Numbers that are not multiples of may be used.

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

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