化简sin8°+cos8°\sin8°-cos8°
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 20:34:11
![化简sin8°+cos8°\sin8°-cos8°](/uploads/image/z/2497809-57-9.jpg?t=%E5%8C%96%E7%AE%80sin8%C2%B0%2Bcos8%C2%B0%5Csin8%C2%B0-cos8%C2%B0)
化简sin8°+cos8°\sin8°-cos8°
化简sin8°+cos8°\sin8°-cos8°
化简sin8°+cos8°\sin8°-cos8°
(sin8°+cos8°)/(sin8°-cos8°)
=(sin8°+cos8°)²/[(sin8°-cos8°)(sin8°+cos8°)]
=[1+sin16°]/[-(cos²8°-sin²8°)]
=-(1+sin16°)/cos16°