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A function that can be used in Formulas.
arcsin (x)
x.
arcsin (x) is defined for -1 ≤ x ≤ 1.
assert arcsin (-1.1) = undefined
assert abs (arcsin (-1.0) - -pi/2) < 1e-17
assert arcsin (0.0) = 0
assert abs (arcsin (1.0) - pi/2) < 1e-17
assert arcsin (1.1) = undefined
assert arcsin (undefined) = undefined
© Paul Boersma 2023