Calculus II

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Angular coordinate

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Calculus II

Definition

An angular coordinate is a measurement that specifies the angle of a point relative to a fixed direction, typically the positive x-axis. It is commonly denoted by the Greek letter $\theta$ and measured in radians or degrees.

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5 Must Know Facts For Your Next Test

  1. Angular coordinates are essential in expressing points in polar coordinates.
  2. The angular coordinate $\theta$ determines the direction of a point from the origin.
  3. Angular coordinates can be positive or negative: counterclockwise measurements are positive and clockwise measurements are negative.
  4. In parametric equations, angular coordinates often describe circular or spiral motions.
  5. The interval for angular coordinates is usually $0 \leq \theta < 2\pi$ radians.

Review Questions

  • What does an angular coordinate measure?
  • How is an angular coordinate represented in polar coordinates?
  • In what units can you express an angular coordinate?

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