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import java.io.File;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*
*/
public class Main {
/**
* Returns the <a href="http://mathworld.wolfram.com/HyperbolicCosine.html">
* hyperbolic cosine</a> of x.
*
* @param x double value for which to find the hyperbolic cosine
* @return hyperbolic cosine of x
*/
public static double cosh(double x) {
return (Math.exp(x) + Math.exp(-x)) / 2.0;
}
}
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