Understand Cosine Function Properties: To solve the problem, we need to understand the properties of the cosine function and how it is affected by transformations. The function y=cos(x−23π)−1 involves a horizontal shift and a vertical shift of the basic cosine function y=cos(x).
Horizontal and Vertical Shifts: The horizontal shift is given by the phase shift (3π)/2 to the right. This means that the cosine function, which normally has a maximum at x=0, will now have this maximum shifted to x=(3π)/2.
Evaluate Function: The vertical shift is given by subtracting 1 from the cosine function. This means that the entire graph of the cosine function is shifted down by 1 unit.
No Specific Value Provided: We can now evaluate the function at any value of x. However, since the problem does not specify a particular value of x, we cannot provide a numerical answer. Instead, we have described the transformation of the cosine function.
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