问题
填空题
化简
|
答案
原式=sin(π-α)tan(2π+
+α)π 2 cos(2π-α)cot(
-α)π 2
=sinαtan(
+α)π 2 cos(-α)tanα
=-sinαcotα cosαtanα
=-cotα.
故答案为:-cotα
化简
|
原式=sin(π-α)tan(2π+
+α)π 2 cos(2π-α)cot(
-α)π 2
=sinαtan(
+α)π 2 cos(-α)tanα
=-sinαcotα cosαtanα
=-cotα.
故答案为:-cotα