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<!DOCTYPE html> <html> <body> <h1>JavaScript Math</h1> <h2>The Math.acosh() Method</h2> <p>Math.acos() returns the arccosine of a number:</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = Math.acos(1); </script> </body> <!-- /jsref/tryit.asp?filename=tryjsref_acos2 </html>
