Long description: TrigFig15
Alt text: A diagram shows an angle labeled \(x\) in standard position on a circle centered at the origin.
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- The image displays a circle centered at the point labeled \(O\) (the origin).
- Two radii define the angle: one originating from the point labeled \(P\) and extending along a horizontal dashed line to the right, and a second radius extending from \(O\) to a point labeled \(Q'\).
- The angle formed by the two radii is marked and labeled with \(x\) radians.
- The terminal side of the angle, passing through \(Q'\), is shown in the second quadrant of the coordinate plane.
- Dotted lines indicate the positions of points \(P\), \(Q'\), and the horizontal axis used for reference.