11.* 1 point if cosa, cos6, cosy are the direction cosines of any line, then cot a. sinta t cot"p. sin f + cot y. sin"y-? (a) 4 (c) 2 (b) 3 (d) o a ob o od 12.*

11.* 1 point If cosa, cos6, cosy are the direction cosines of any line, then cot a. sinta t cot"p. sin f + cot y. sin"y-? (a) 4 (C) 2 (b) 3 (d) O a Ob O Od 12.* 1 point C is a point on the line segment AB joining the points A(3,5,-1) and B(6,3,-2). If y- coordinate of point C is2, then its x-coordinate will be (a) 4 b) 17/3 (C)15/2 d) -10