In a graph, sketch one period of y=cos (1/2)*(t)) and y=cos(2t)



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The trigonometric function cos(x) has a period of `2*pi` . y = cos((1/2)*t) has a period of `4*pi` and y = cos(2*t) has a period of `pi` .

In red: y = cos(x/2) and in green: y = cos(2*x)

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