The graph of y is equal to cosine of open paren x plus pi over 2 close paren is the graph of the y is equal to cosine of x shifted in which direction?

Adding π/2 inside the input shifts the cosine graph horizontally in the opposite direction: y = cos(x + π/2) is y = cos(x) shifted π/2 units to the left. Therefore, the correct choice is “π/2 units to the left.”

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