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  1. www.math.net › tangentTangent - Math

    The right-angled triangle definition of trigonometric functions is most often how they are introduced, followed by their definitions in terms of the unit circle. Right triangle definition. For a right triangle with one acute angle, θ, the tangent value of this angle is defined to be the ratio of the opposite side length to the adjacent side ...

  2. en.wikipedia.org › wiki › Atan2atan2 - Wikipedia

    Among these languages are: C's math.h standard library, the Java Math library, .NET's System.Math (usable from C#, VB.NET, etc.), the Python math module, the Ruby Math module, the Go math package and elsewhere. In addition, many scripting languages, such as Perl, include the C-style atan2(y, x) function.

  3. If you prefer it, you can drag the origin into any corner to display just one quadrant. The point A is in the top right quadrant (first quadrant). Note how both x and y coordinates are positive because the point is up and to the right of the origin. Drag the point into the top left quadrant (second quadrant).

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