20 15 mathematics Chaoyang Yimo

This topic mainly examines the equation of circle and polar coordinate system.

The parametric equation of the curve is eliminated and added, so that the curve represents a circle with the coordinate origin as the center and the radius as the center.

When the parameters are eliminated from the curve, a straight line can be obtained.

The equation of simultaneous straight line and circle is obtained and solved, that is, the coordinate of intersection point is, and it is converted into polar coordinate form.

So the correct answer to this question is.

Listen, do the math.

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