ASIN Function

Returns the arcsine of x.

result = ASIN(x)

x The sine of the desired angle. Cannot be a complex data type and must be in the range of (- 1 x 1).

result The arcsine of x.

None.

The inverse sine function, or arcsine, denoted by sin ^{- 1}, is defined by:

y = sin^{- 1}x

if and only if

sin y = x

where

-1 x 1 and -/2 y /2

The parameter x can be an array, with the result having the same data type as x, where each element contains the arcsine of the corresponding element from x.

When x is of double-precision floating-point data type, the result is of the same type. All other data types are converted to single-precision floating-point and yield a floating-point result. The result is an angle, expressed in radians, whose sine is x.

Values generated by ASIN range between -/2 and /2.

x = ASIN(0)
PRINT, x

SIN

For a list of other transcendental functions, see Chapter 1, Functional Summary of Routines.