Class XII Vectors A and B are Collinear if they are parallel to the same line irrespective of their magnitudes and directions. if the direction cosines of one are negatives of the other if they are have equal magnitude if they are in the same line Vectors A and B are equal if they have the same magnitude if they have the same magnitude and direction if they have the same magnitude and opposite direction if they have the same direction Direction cosines are cosines of Direction angles are cotangents of Direction angles are tangents of Direction angles are sines of Direction angles Which of the following is a vector? energy mass charge acceleration Unit Vector is A vector whose direction angle α is unity A vector whose direction angle γ is unity A vector whose direction angle β is unity A vector whose magnitude is unity Do you really want to submit this quiz? Cancel Submit Quiz