quadrant
(noun)
One of the four quarters of the Cartesian plane bounded by the
Examples of quadrant in the following topics:
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Special Angles
- In quadrant II, “Smart,” only sine is positive.
- Reference angles in quadrant I are used to identify which value any angle in quadrants II, III, or IV will take.
- For any given angle in the first quadrant, there is an angle in the second quadrant with the same sine value.
- For any angle in quadrants II, III, or IV, there is a reference angle in quadrant I.
- For any angle in quadrants II, III, or IV, there is a reference angle in quadrant I.
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Abdominopelvic Regions
- The most common divisions for the abdominopelvic region are the four quadrants and nine regions.
- The abdominopelvic region can be divided into four quadrants.
- These quadrants are defined by the intersection of the saggital plane with the umbilical plane (the transverse plane through the navel).
- In the right lower quadrant sits the cecum, appendix, part of the small intestines, the right half of the female reproductive system, and the right ureter.
- The nine divisions of the abdominopelvic region are smaller than the four quadrants, allowing for a more detailed discussion.
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The Cartesian System
- The Cartesian coordinate system is broken into four quadrants by the two axes.
- Some basic rules about these quadrants can be helpful for quickly plotting points:
- Quadrant II: Points have negative $x$ and positive $y$ coordinates, $(-x,y)$.
- Quadrant IV: Points have positive $x$ and negative $y$ coordinates, $(x,-y)$.
- The four quadrants of theCartesian coordinate system.
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Location, location, location
- In figure 4.5, we've used the "drag and drop" method ("grab" a node with the cursor, and drag it to a new location) to relocate the nodes so that organizations that share the same combinations of attributes are located in different quadrants of the graph.
- If the hypothesis were strongly supported (and its not) most of the arrows would be located within each the four quadrants, and there would be few arrows between quadrants.
- The upper left-hand quadrant contains mostly "blue" nodes, while the lower right quadrant contains mostly "red" ones -- so one "direction" might be interpreted as "non-government/government. "
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Anatomy of the Liver
- It is located in the right upper quadrant of the abdominal cavity, resting just below the diaphragm.
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Defining Trigonometric Functions on the Unit Circle
- The x- and y-axes divide the coordinate plane (and the unit circle, since it is centered at the origin) into four quarters called quadrants.
- We label these quadrants to mimic the direction a positive angle would sweep.
- The four quadrants are labeled I, II, III, and IV.
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Issues with the Traditional Political Spectrum
- This puts left-wingers in the left quadrant, libertarians in the top, right-wingers in the right, and what Nolan originally named "populists" at the bottom.
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Further Transcendental Functions
- Top panel: Trigonometric function sinθ for selected angles $\theta$, $\pi - \theta$, $\pi + \theta$, and $2\pi - \theta$ in the four quadrants.
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Appendicitis
- Later, as the appendix becomes more inflamed and irritates the adjoining abdominal wall, it tends to localize over several hours into the right lower quadrant, except in children under three years.
- In case of a retrocecal appendix (appendix localized behind the cecum), however, even deep pressure in the right lower quadrant may fail to elicit tenderness (silent appendix), the reason being that the cecum, distended with gas, protects the inflamed appendix from the pressure.
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Sine and Cosine as Functions
- Notice how the sine values are positive between $0$ and $\pi$, which correspond to the values of the sine function in quadrants I and II on the unit circle, and the sine values are negative between $\pi$ and $2\pi$, which correspond to the values of the sine function in quadrants III and IV on the unit circle.