f(x)=sin xcosα+sinαcos x
=sin(x+α)
直接用sin(a+b)=sinacosb+cosasinb
【中学生数理化】团队为您答题,
f(x)=sin xcosα+sinαcos x,x∈R,0＜α＜π,如何化简?
1个回答
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