ASin

PowerScript function

Description

Calculates the arcsine of an angle.

Syntax

ASin ( n )

1	ASin ( n )

Argument	Description
n	The ratio of the lengths of two sides of a triangle for which you want a corresponding angle (in radians). The ratio must be a value between -1 and 1.

Return value

Double. Returns the arcsine of n.

Examples

This statement returns .999998 (rounded to six places):

ASin(.84147)

1	ASin(.84147)

This statement returns .520311 (rounded to six places):

ASin(LogTen (Pi (1)))

1	ASin(LogTen (Pi (1)))

This statement returns 0:

ASin(0)

ASin(0)

This code in the Clicked event of a button catches a runtime error
that occurs when an arcsine is taken for a user-entered value — passed in
a variable — that is outside of the permitted range:

Double ld_num
ld_num = Double (sle_1.text)
 
TRY
sle_2.text = string (asin (ld_num))
CATCH (runtimeerror er)
   MessageBox("Runtime Error", er.getmessage())
END TRY

Double ld_num

ld_num = Double (sle_1.text)

TRY

sle_2.text = string (asin (ld_num))

CATCH (runtimeerror er)

MessageBox("Runtime Error", er.getmessage())

END TRY

See also

Sin

ACos

ATan

ASin method for DataWindows in the section called “ASin” in DataWindow Reference.

Document get from Powerbuilder help

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Powerbuilder Documentation 2017

August 20, 2023

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