# arc tangent

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## arc tangent

[¦ärk ′tan·jənt]
(mathematics)
Also known as antitangent; inverse tangent.
For a number x, any angle whose tangent equals x.
For a number x, the angle between -π/2 radians and π/2 radians whose tangent equals x ; it is the value at x of the inverse of the restriction of the tangent function to the interval between -π/2 and π/2.
References in periodicals archive ?
The method of Hurwitz-Radon Matrices (MHR) enables interpolation of two-dimensional curves using different coefficients [gamma]: polynomial, sinusoidal, cosinusoidal, tangent, cotangent, logarithmic, exponential, arcsin, arccos, arctan, arcctg or power function [16], also inverse functions.
u] = 1 this gives for each tree a formula related to the arctan function.
1 Applications: some identities involving the arctan function
So [phi] = [gamma]/2[pi] (arctan x + b/z - arctan x - b/z) (4)
realpart := Arcsin(B) else - - use arctan and an accurate approximation to [Alpha] - x if x [is less than or equal to] 1 then Answer.
2])] = arctan (x/ [square root of ([Alpha] + x) ([Alpha] - x))]
Let [theta] = arctan x/z [member of] (-[pi], [pi]] denote the angle, measured parallel to the y = 0 plane, that a point (x, y, z) makes with the positive z-axis (as described in Section 4).
arctan (1/it) = i/2 In (t - 1)/(t + 1) = i/2 In |(t - 1)/(t + 1)| - 1/2 arg (t - 1)/(t + 1)
gamma] [member of][[theta] - arctan(tan [theta]/[delta]), arctan (tan [theta]/[delta]) - [theta]].
absolute value of [theta]] [less than or equal to] arctan (1/[c.
compute the orientations of the segments in gesture trajectory [theta]t = arctan [y.

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