Set f(x, y) equal to a constant to sketch level curves. Work through circles and parallel lines, including levels with no points.
Read MoreGraph polar lemniscates using sine or cosine, the leading sign, and the maximum radius. Includes r² = 3 cos(2θ), r² = 4 sin(2θ), and valid angles.
Read MoreChoose top minus bottom or right minus left by testing the curves between intersections. Work through two source examples and learn when to split the integral.
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