1.1.56 Vector Algebra

Condition: Dots \ (A (0, -3, -1), \ Quad b (2, -1,1) \), \ (C (1.0, -3), \ quad D (3.3.2) \). Determine: a) a single vector, collinear and opposite to the vector \ (\ overline {a b} \); b) the sinus of the angle between the vectors \ (\ overline {a b} \) and \ (\ overLine {a c} \); c) Will the vectors \ (\ overLine {a b}, \ overLine {a c} \) and \ (\ overLine {a d} \) are compiled.