化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 05:58:03
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
cos(27°+α)cos(33°-α)-sin(27°+α)sin(33°-α)
=cos[(27°+α)+(33°-α)]
=cos60°
=1/2
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简:cos(60-α)-cos(60+α)
化简:cos(-π-α)
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cos
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