Could this be a part if the normalization grid?



Could this be a part if the normalization grid?

Originally shared by Vivax Solutions

The Four Quadrants in Trigonometry

The sign and value of trigonometric functions - sine, cosine or tan - depend on the quadrant they line in. The measurement of an angle has a convention too - anticlockwise, starting from the  bottom of the first quadrant.

The following animation shows how the quadrants affect the sign of a trigonometric value.

The acronym for remembering it, CAST, is at the centre of the animation.

If you need the basic information of trigonometric functions, please follow the link below:

http://www.vivaxsolutions.com/maths/gcsetrigonometry.aspx

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