What are the characteristics of the quadratic (square) function f(x) = x^2? Provide a brief explanation on its graph, vertex, axis of symmetry, and the x-intercepts (if any).
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Question: Find the domain and range of the function f(x) = √(x^2 - 4) - 3.
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What is the value of the cosine function at an angle of 120 degrees on the unit circle chart?