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A term also known as "inverse tan" involved with trignonometry used in mathematics.

Utilized when trying to determine one angle of a (i.e.) right angle triangle.

Involved with dividing the 2nd function of tan by the opposite and the adjacent numbers which normally would be given. (i.e. Determine the angle D of this right angle triangle. Opposite = 14 Adjacent = 10 ... Tan-1 {14 divided by 10} Angle D = your answer = 84.28)
Also related to the 2nd function Of Sin and Cos.

(2nd function = Tan-1)
"Use the 2nd function of Tan to determine the angle K of that right angle triangle"
by LilMaddie May 04, 2016
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