问题
选择题
化简
|
答案
sin(60°+θ)+cos120°sinθ cosθ
=sin60°cosθ+cos60°sinθ+cos120°sinθ cosθ
=
cosθ3 2 cosθ
=
.3 2
故选D.
化简
|
sin(60°+θ)+cos120°sinθ cosθ
=sin60°cosθ+cos60°sinθ+cos120°sinθ cosθ
=
cosθ3 2 cosθ
=
.3 2
故选D.