This post categorized under Vector and posted on May 9th, 2019.

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Negative angles are a way of measuring an angle from a different direction. A positive angle is created by rotating counter-clockwise around the origin of a coordinate system starting at the x-axis (the horizontal axis) and proceeding through the quadrants in the order I II III IV.There are two main ways to label angles 1. give the angle a name usually a lower-case letter like a or b or sometimes a Greek letter like (alpha) or (theta) 2. or by the three letters on the shape that define the angle with the middle letter being where the angle actually is (its vertex).09.09.2013 Parallel and Perpendicular Lines Transversals Alternate Interior Angles Alternate Exterior Angles - Duration 4156. The Organic Chemistry Tutor 101032 views 4156Autor mathanticsAufrufe 17Mgraphiclnge 8 Min.

29.08.2014 Go to httpwww.examsolutions.net for the index playlists and more maths graphic on the quadrant rule or CAST diagram and other maths topics.Autor ExamSolutionsAufrufe 113Kgraphiclnge 8 Min.Notice that the terminal sides of the angles measuring 30 degrees and 210 degrees 60 degrees and 240 degrees and so on form straight lines. This fact is to be expected because the angles are 180 degrees apart and a straight angle measures 180 degrees.See Trig functions of large and negative angles Coterminal angles If you have one angle of say 30 another of 390 the two terminal sides will be in the same place (390 36030).

Drag the point clockwise to make negative angles and note how the reference angle remains positive. It is always 90 As you can see from the figure above the reference angle is always less than or equal to 90 even for very large angles.In plane geometry an angle is the figure formed by two rays called the sides of the angle sharing a common endpoint called the vertex of the angle. Angles formed by two rays lie in a plane but this plane does not have to be a Euclidean plane.The ASTC or CAST or unit circle method for finding two angles having a given sine cosine or tangent In this method you draw a set of axes and label the quadrants 1 2 3 and 4 with the letters A S T and C respectively as shown in the diagrams below.