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in polar coordinates, the axis determined by theta = 0 is called the axis.

POLAR AXIS.

The reference point (analogous to the origin of a Cartesian system) is called the pole, and the ray from the pole in the reference direction is the polar axis. The distance from the pole is called the radial coordinate or radius, and the angle is called the angular coordinate, polar angle, or azimuth.

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I’m not sure i’m sorry

Use a calculator basically