51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
/****************************************************************************
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* libs/libc/fixedmath/lib_b16cos.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <fixedmath.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: b16cos
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****************************************************************************/
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b16_t b16cos(b16_t rad)
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{
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/* Compute cosine: sin(rad + PI/2) = cos(rad) */
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rad += b16HALFPI;
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if (rad > b16PI)
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{
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rad -= b16TWOPI;
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}
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return b16sin(rad);
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}
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