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How to draw the graph of y = sin x and x in the range of -pi to pi

This lesson shows how to draw the graph of y = sin x and x in the range of -pi to pi. Since the sine function has a period of 2pi which implies that sin(x + 2pi n) = sin x for all integer n. Note that the sine graph is symmetric with respect to the origin.  So the sine function is odd. That is, sin(-x) = -sin x