Name: acos

Type: function

Syntax: the acos of <number> 

Syntax: acos(<number>)

Summary: <return|Returns> the arc cosine of a number, in radians.

Introduced: 1.0

OS: mac,windows,linux,ios,android

Platforms: desktop,server,web,mobile

Example:
acos(-1)

Example:
acos(cos(.3))

Example:
acos(field "Opposite" + field "Sine")

Parameters:
number: A number between -1 and 1, or an expression that evaluates to such a number.

The result: The result of the <acos> function is <return|returned> in radians. To get this result in <degree|degrees>, use the following <function> :.

Returns: The <acos> function <return|returns> a number between zero and pi.

Description:
Use the <acos> <function> to find the arc cosine of a number.

The arc cosine of <number> is an angle whose cosine is equal to <number>. In other words, <acos> is an <inverse> of the <cos> <function>.

  function acosInDegrees theMagnitude
    return acos(theMagnitude) * 180 / pi
  end acosInDegrees

References: inverse (keyword), pi (constant), cos (function), return (glossary), degree (glossary), function (control_st)

Tags: math
