    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements.  See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache License, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License.  You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the License for the specific language governing permissions and
    015     * limitations under the License.
    016     */
    017
    018    package org.apache.commons.math3.analysis.function;
    019
    020    import org.apache.commons.math3.analysis.BivariateFunction;
    021    import org.apache.commons.math3.util.FastMath;
    022
    023    /**
    024     * Arc-tangent function.
    025     *
    026     * @since 3.0
    027     * @version $Id: Atan2.java 1364377 2012-07-22 17:39:16Z tn $
    028     */
    029    public class Atan2 implements BivariateFunction {
    030        /** {@inheritDoc} */
    031        public double value(double x, double y) {
    032            return FastMath.atan2(x, y);
    033        }
    034    }