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单词 TerminalRay
释义

terminal ray


Let an angle whose in radians is θ be placed the Cartesian plane such that one of its rays R1 corresponds to the nonnegative x axis and one can go from the point (1,0) to the point that is the intersectionMathworldPlanetmath of the other ray R2 of the angle with the circle x2+y2=1 by traveling exactly θ units on the circle. (If θ is positive, the distance should be traveled counterclockwise; otherwise, the distance |θ| should be traveled clockwise. Also, note that “other ray” is used quite loosely, as it may also correspond to the nonnegative x axis also.) Then R2 is the terminal ray of the angle.

The picture below shows the terminal ray R2 of the angle θ=2π3.

xyR1R2θx2+y2=1
随便看

 

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更新时间:2025/5/4 21:09:14