The trigonometric expression (sin๐-tan๐ (cos๐-cot๐) can be shown to be identical to which of the followings?
(A) 1/2๐ ๐๐2๐ โ 1 (B) 1 (C) (๐ ๐๐๐ โ 1)(๐๐๐ ๐ โ 1) (D) ๐ ๐๐๐๐๐๐ ๐ โ 1
(sin๐-tan๐) (cos๐-cot๐)
sin๐(1-1/cos๐) * cos๐(1 - 1/sin๐)
so, C