deg2rad.c (1006B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include "stdlib/math/base/special/deg2rad.h" 20 21 // π / 180.0 22 static const double PI_DIV_180 = 1.7453292519943295e-2; 23 24 /** 25 * Converts an angle from degrees to radians. 26 * 27 * @param x angle in degrees 28 * @return angle in radians 29 * 30 * @example 31 * double y = stdlib_base_deg2rad( 90.0 ); 32 * // returns ~1.571 33 */ 34 double stdlib_base_deg2rad( const double x ) { 35 return x * PI_DIV_180; 36 }