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<!DOCTYPE html>
<html>
<body>
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<h1>Math.tanh()</h1>
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<p>单击该按钮可显示数字 1 的双曲正切值。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  document.getElementById("demo").innerHTML = Math.tanh(1);
}
</script>
​
</body>
</html>
​