Well, at point P, the velocity vector QP is perpendicular to the line QP, 1 so the sine of that angle is one.

点P，速度向量,垂直于直线，所以该角的正弦值为。

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Having your model extend the chin forward by just a half an inch will re-define the jaw line regardless of camera Angle.

这种情况下让模特将她们的下巴向前伸半英寸，不管相机在什么角度，都可以重建下巴轮廓。

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If there is a line passing the top of the ruler, and parallel to the equator, then the Angle between the line and the ruler is equal to the latitude here.

如果有一条线和赤道线平行，而且经过尺的顶端，这条线和尺的夹角就等于纬度。

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And instead of a drag on the bottom line, Roomba has subsidized the development of what Angle hopes is the next big step for iRobot: health care.

FORBES: Invasion Of The Machines: iRobot Hunts Bombs, Cleans Floors, Now Wants To Heal You

You update your internal picture, perhaps changing the angle of some of a line here or there, or adding another element.

FORBES: Your Brain Was Made For Visual Modeling

For instance, the kiosk explains that Rothermel's deliberate perspective puts the viewer 125 yards from the copse of trees just below Cemetery Ridge in an area of the battle line known as "the Angle, " a jog in the stone wall defended by the Philadelphia Brigade.

WSJ: Capturing Gettysburg | Objects of Valor | State Museum of Pennsylvania | By Mark Yost