Long description: Trig6Fig8
Alt text: A circle is drawn on a coordinate plane, with a point P marking the end of a line segment r drawn from the origin O, forming an angle \(\theta\) with the positive x-axis.
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- The image displays a standard Cartesian coordinate system with a horizontal x-axis and a vertical y-axis, intersecting at the origin labeled O.
- A circle is centered at the origin O.
- A line segment, labeled r, is drawn from the origin O to a point P on the circumference of the circle in the first quadrant.
- An angle, labeled \(\theta\), is indicated between the positive x-axis and the line segment r.