ACos

Description

Calculates the arccosine of an angle.

Syntax

ACos ( 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.

Returns

Double. Returns the arccosine of n.

Examples

Example 1

This statement returns 0:

ACos(1)

Example 2

This statement returns 3.141593 (rounded to six places):

ACos(-1)

Example 3

This statement returns 1.000000 (rounded to six places):

ACos(.540302)

Example 4

This code in the Clicked event of a button catches a runtime error that occurs when an arccosine 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 (acos (ld_num))

CATCH (runtimeerror er)

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

END TRY