The angle cosign effect is always in favor of a target in what mode?

The correct answer is stationary mode because, in this context, the angle cosign effect refers to the impact of the angle between the line of sight and the direction of motion on a target's visibility and detection. When a target is stationary, the measurements taken by an officer—in terms of radar or other tracking methods—are consistently impacted by this angle, making it easier for the target to remain undetected or for their speed to be underestimated.

In stationary mode, the cosine of the angle is always maximized, which results in a more favorable condition for the target, as any deviation from a direct line can significantly diminish the effectiveness of the measurement tool being used. This means that the stationary target's speed may be perceived as less than it actually is, thus influencing assessment and response decisions made by law enforcement.

In contrast, in other modes like moving or high-speed mode, targets may be in a more dynamic situation where variables such as speed and direction create more variability in how they are detected and assessed. In reverse mode, the effectiveness of direct targeting measures may also diminish, but the angle cosign effect is most favorably positioned for a stationary target.