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JavaScript acos() Method
JavaScript acos() Method
JavaScript acos() method is used to return the arccosine value of a given input number. It returns the value between 0 and PI radians. If the parameter x is outside the range -1 to 1 then the method will return NaN and if it is equal to -1 then it will return the value of PI.
Syntax:
Math.acos(x)
Parameter Values
| Parameter | Description |
|---|---|
| x | This is a required parameter. It defines the given input number. |
Browser Support
| Method | Chrome | Edge | Firefox | Safari | Opera |
|---|---|---|---|---|---|
| acos() | Yes | Yes | Yes | Yes | Yes |
Here is an example of JavaScript acos() method:
<html>
<body>
<p>Click the button to see the Output.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("demo").innerHTML = Math.acos(0.77);
}
</script>
</body>
</html>
Output:
Click the button to see the Output.
Example 2:
<html>
<body>
<p>Click the button to see the Output.</p>
<button onclick="myFunction1()">Try it</button>
<p id="demo1"></p>
<script>
function myFunction1() {
document.getElementById("demo1").innerHTML = Math.acos(-1);
}
</script>
</body>
</html>
Output:
Click the button to see the Output.
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