What is the maximum value of the cosine function when the angle is in radians?
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What is the general form of a hyperbola equation, and how does it relate to its characteristics?
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What is the general equation of an ellipse centered at (h, k), with semi-major axis a, semi-minor axis b, and the foci located at (h Β± c, k), where c = β(a^2 - b^2)?