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<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>To use degrees, convert the degrees to radians first:</p><p id="demo"></p><script>document.getElementById("demo").innerHTML ="Cosine of 0 degrees is: " + cosine(0) +"<br>" +"Cosine of 60 degrees is: " + cosine(60) +"<br>" +"Cosine of 90 degrees is: " + cosine(90) +"<br>" +"Cosine of 180 degrees is: " + cosine(180) +"<br>" +"Cosine of 240 degrees is: " + cosine(240) +"<br>" +"Cosine of 360 degrees is: " + cosine(360);function cosine(degree) {// radians = degrees * PI / 180 let x = Math.cos(degree * Math.PI / 180); return x.toFixed(2); }</script></body></html>