This package is part of stdlib, a standard library for JavaScript and Node.js focused on numerical and scientific computing. It provides a function to compute the inverse versed cosine (avercos) of a single-precision floating-point number, which is defined as the arccosine of 1 plus the input value. The function is useful for mathematical and scientific applications that require this specific trigonometric calculation, returning NaN for inputs outside the valid range of -2 to 0.
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