问题
选择题
tan300°+cot405°的值为( )
|
答案
tan300°+cot405°
=tan(360°-60°)+cot(360°+45°)
=-tan60°+cot45°
=-
+13
故答案选B
tan300°+cot405°的值为( )
|
tan300°+cot405°
=tan(360°-60°)+cot(360°+45°)
=-tan60°+cot45°
=-
+13
故答案选B