sin13°cos77°+cos13°sin77°=
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/05 22:47:01
sin13°cos77°+cos13°sin77°=
sin13°cos77°+cos13°sin77°=
sin13°cos77°+cos13°sin77°=
公式:sinacosb+cosasinb=sin(a+b)
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sin13°cos77°+cos13°sin77°=sin(13°+77°)=sin90°=1
sin13°cos77°+cos13°sin77°=
=sin(13+77)
=sin90
=1
sin13°cos77°+cos13°sin77°=sin(13°+77°)=sin90°=1
sin13°cos77°+cos13°sin77°=
sin17°cos13°+cos17°cos77°=
化简sin13°cos17°+sin17°cos13°,
sin13°cos17°+cos13°sin17°
化简:sin43°-sin13°cos30°/cos13°
cos43°cos13° +sin43°sin13°的值,
cos13°cos58°+sin13°sin58°怎么算
sin317°cos13°+cos137°sin13°等于多少
计算:cos13°×cos47°+sin13°×cos137°,
请问,sin13°*sin43°+sin77°*sin47°怎么化成sin13°*sin43°+cos13°*cos43°?
sin13°+cos30°sin17°/cos13°-sin30°sin17°化简求值
cos73°cos13°+cos17°sin13°=求答案
sin43°cos13°-cos43°sin13°具体一点的过程
cos47°cos13°-cos43°sin13°的值
计算sin43°cos13°+sin13°cos43°等于多少
sin43°cos13°
sin13度=cos77度么?
设α=1/2cos6°-√3/2sin6°,b=2sin13°cos13°,c=√((1-cos50°/2))判断abc大小(快改:设α=(1/2)cos6°-(√3/2)sin6°,b=2sin13°cos13°,c=√((1-cos50°/2))