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How to Use the acos () method in JavaScript

Source: Internet
Author: User
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How to Use the acos () method in JavaScript

Returns the arc cosine of the radians returned by this method. The ACOS method returns the radians between 0 and PI for the X-1 and 1. If the number value exceeds this range, NaN is returned.

Syntax

 

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Math. acos (x );

The following is the detailed information about the parameters:

  • X: a number

Return Value:

  • Returns the arc cosine of radians.

Example:

 

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<Html>

<Head>

<Title> JavaScript Math acos () Method </title>

</Head>

<Body>

<Script type = "text/javascript">

 

Var value = Math. acos (-1 );

Document. write ("First Test Value:" + value );

 

Var value = Math. acos (null );

Document. write ("<br/> Second Test Value:" + value );

 

Var value = Math. acos (30 );

Document. write ("<br/> Third Test Value:" + value );

 

Var value = Math. acos ("string ");

Document. write ("<br/> Fourth Test Value:" + value );

</Script>

</Body>

</Html>

This produces the following results:

 

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First Test Value: 3.141592653589793

Second Test Value: 1.5707963267948965

Third Test Value: NaN

Fourth Test Value: NaN

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