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33 lines
681 B
Plaintext
33 lines
681 B
Plaintext
NAME
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asin - inverse trigonometric sine
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SYNOPSIS
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asin(x [,eps])
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TYPES
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x real, -1 <= x <= 1
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eps nonzero real, defaults to epsilon()
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return real
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DESCRIPTION
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Returns the asin of x to a multiple of eps with error less in
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absolute value than .75 * eps.
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v = asin(x) is the number in [-p1/2, pi/2] for which sin(v) = x.
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EXAMPLE
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> print asin(.5, 1e-5), asin(.5, 1e-10), asin(.5, 1e-15), asin(.5, 1e-20)
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.5236 .5235987756 .523598775598299 .52359877559829887308
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LIMITS
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unlike sin and cos, x must be real
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abs(x) <= 1
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eps > 0
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LIBRARY
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NUMBER *qasin(NUMBER *q, NUMBER *epsilon)
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SEE ALSO
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acos, atan, asec, acsc, acot, epsilon
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