# arc sine

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## arc sine

[¦ärk ¦sīn]
(mathematics)
Also known as antisine; inverse sine.
For a number x, any angle whose sine equals x.
For a number x, the angle between -π/2 radians and π/2 radians whose sine equals x ; it is the value at x of the inverse of the restriction of the sine function to the interval between -π/2 and π/2.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Coefficients for curve modeling are computed using probability distribution functions: polynomials, power functions, sinus, cosine, tangent, cotangent, logarithm, exponent or arcsin, arccos, arctan, arcctg.
If the variance and mean of X and Y are the same (and they are usually close here), then M/1000 is equivalent to the standard correlation coefficient r, except that the arcsin transformation (applied to a measure of Mielke 1991) means that the deviation from unity asymptotes to the square root of mse, rather than mse itself.
The arcsin [square root of x] transformation was used to normalize the fraction of cells in the S phase of the cell cycle, fraction of cells in the G2-M phases of the cell cycle, and RSG1.
[[phi].sub.1] = [pi] + arcsin [[absolute value of [GAMMA]].sub.0]/[[absolute value of [GAMMA]] - [[beta].sub.0], [[phi].sub.2] = 2[pi] - arcsin [[absolute value of [GAMMA]].sub.0]/[[absolute value of [GAMMA]] - [[beta].sub.0].
[alpha](i) = arcsin [2 (dx(i) - [dx.sub.-90]/[dx.sub.+90] - [dx.sub.-90] - 0.5)], (1)
[DELTA][phi] = 2 x arcsin [[a.sub.z]/[2 x [R.sub.v] x cos [[alpha].sub.v]]] (13)
7: [F.sub.6,23] = 1.08, P = 0.41, with arcsin transformation).
Demographic data were tested for normality, and transformed when necessary; proportions were transformed by arcsin [check]p (Zar, 1999).
d = 2R X arcsin ([square root of [haversin([DELTA][PHI]) + cos [[phi].sub.1]cos [[phi].sub.2]haversin([DELTA][phi])]])
Analyses.--I compared the among-year differences of A) percent daily loss in mass while nest-guarding (arcsin transformed) and B) percent daily gain in mass subsequent to release (arcsin transformed) with one-way ANOVAs, using proportional values to accommodate for the differences in size of the spiders.
and rewriting the "arcsin" as an "arctan" form, we obtain the new integral

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