COMEDK 2008: If log2 : sin x - log2 cos x - log2(1 - tan2x) = - 1, then (A) (nπ/2)+(π/8),n∈ Z (B) nπ-(π/8),n∈ Z (C) (nπ/4)+(π/8),n∈ Z.
確定! 回上一頁