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Re: Need formulas for arcsin and arctan
From: Bill B
Date: 2006 Mar 28, 01:54 -0500
From: Bill B
Date: 2006 Mar 28, 01:54 -0500
> Finally, since arcsine(x) is simply "the angle whose sine is x" scanning > down a conventional table of sines will easily give you the answer to a > degree... Exposing my ignorance (again), arcsine is a bit confusing to me. Every definition I find in my (old) reference books relates it to an angle in radians. As an analogy, "font" had a specific meeting prior to the computer. It meant not only a font "family" bit a specific size, weight, slant, compressions or expansion, designer or foundry etc.. 12 pt Caslon No. 540 Italic was one font, 14 pt Caslon No. 540 Italic another font, as was 36 point Bodoni Campanile (Ludlow). Now "font" is a very loose description, tied mostly to the intellectual-property laws. So my question, is/was "arcsine" a term that applied only to "the angle whose sine is x," in radians, while sin^-1 can apply to whatever system (degrees, rads, grads) one is working in? Thanks Bill
