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<!DOCTYPE html> <html> <body> <h1>JavaScript Math</h1> <h2>The Math.cos() Method</h2> <p>Math.cos() returns the cosine of an angel given in radians.</p> <p id="demo"></p> <script> let x = Math.cos(3.14); document.getElementById("demo").innerHTML = x.toFixed(2); </script> </body> </html>
