[CAS] arc sine of a complex number

[compsystems]

[CAS mode] and use i (set)

ASIN(4.0+i) => 1.31861691808+2.09659645729*i ok

sorry for my bad English

I think that instead of showing the error message "Error: Bad Argument Value" , should say set flag "use i"

"use i" says use i to factor polynomials

that relation has polynomials with complex numbers?