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Ask the high school math book 4-4 directory!
Elective 4-4 coordinate system and parameter equation

Lecture 1: Coordinate System

Section 65438 +0 Plane Cartesian Coordinate System

Polar coordinates in the second quarter

The polar coordinate equation of simple curve in the third quarter

Section 4 Brief Introduction of Cylindrical Coordinate System and Spherical Coordinate System

Lecture 2 parametric equation

Parametric equation of 1 curve

Parametric equation of quadratic curve

The parameter equation of straight line in the third quarter

Section 4 Involute and Cycloid

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