三角的计算求值(1).sin7°+cos15°sin8°-----------------------cos7°+sin15°sin8°(2)2cos10°-sin20°---------------------cos20°
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/10 15:21:05
![三角的计算求值(1).sin7°+cos15°sin8°-----------------------cos7°+sin15°sin8°(2)2cos10°-sin20°---------------------cos20°](/uploads/image/z/11564563-67-3.jpg?t=%E4%B8%89%E8%A7%92%E7%9A%84%E8%AE%A1%E7%AE%97%E6%B1%82%E5%80%BC%281%29.sin7%C2%B0%2Bcos15%C2%B0sin8%C2%B0-----------------------cos7%C2%B0%2Bsin15%C2%B0sin8%C2%B0%282%292cos10%C2%B0-sin20%C2%B0---------------------cos20%C2%B0)
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