From BorielWiki

[edit] ASN

Returns the arc sine value of the given argument. Argument must be a numeric expression. Returned value type is float.

Example:

REM Arc sine value
PRINT "Arc Sine value of a is "; ASN(a)

[edit] Remarks

• This function is 100% Sinclair BASIC Compatible
• If the given argument type is not float, it will be converted to float before operating with it.

[edit] See Also

• COS and ACS
• TAN and ATN
• SIN