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Mathematics 18 Online
OpenStudy (anonymous):

Find a positive integer value of n such that sin(x)=x/n has 69 positive solutions.

OpenStudy (jamesj):

Draw a graph of sin x and then straight lines y = mx. See what happens qualitatively as you tweak m up or down; how many times the straight line intersects the graph of sin x You'll then see how to solve this problem.

OpenStudy (jamesj):

For example, what type of straight line passes through the graph of sin x only three times?

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