repl.txt (487B)
1 2 {{alias}}( x ) 3 Computes the inverse half-value versed sine. 4 5 The inverse half-value versed sine is defined as `2*asin(sqrt(x))`. 6 7 If `x < 0`, `x > 1`, or `x` is `NaN`, the function returns `NaN`. 8 9 Parameters 10 ---------- 11 x: number 12 Input value. 13 14 Returns 15 ------- 16 y: number 17 Inverse half-value versed sine. 18 19 Examples 20 -------- 21 > var y = {{alias}}( 0.5 ) 22 ~1.5708 23 > y = {{alias}}( 0.0 ) 24 0.0 25 26 See Also 27 -------- 28