化简sin(θ-5π)•cot(π2-θ)•cos(8π-θ)tan(3π-θ)•tan(θ-3/2π)•sin(-θ-4π)=_．
问题描述：
化简
=______． sin(θ-5π)•cot(
-θ)•cos(8π-θ)π 2 tan(3π-θ)•tan(θ-
π)•sin(-θ-4π)3 2
答
原式=
=sinθ，-sinθ•tanθ•cosθ -tanθ(-cotθ)•(-sinθ)
故答案为sinθ．