The rectangular coordinate system is also called______________?
Correct answer: B. Cartesian coordinate system
- A. Polar coordinate system
- B. Cartesian coordinate system
- C. Cylindrical coordinate system
- D. Spherical coordinate system
Explanation
The rectangular coordinate system uses mutually perpendicular axes and is called the Cartesian coordinate system, after René Descartes. Polar, cylindrical and spherical systems use different coordinate descriptions rather than the ordinary rectangular x, y and z axes. Option a is a common confusion because polar coordinates can also describe points in a plane.
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About Rectangular Components
A vector is resolved into perpendicular horizontal and vertical components using trigonometric relations, usually as Ax = A cos θ and Ay = A sin θ when θ is measured from the horizontal. Questions involve signs in different quadrants, reconstructing a resultant from components, and using components to analyse equilibrium.
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