The equation `vecr=lamda hati+muhatj` represents the plane (A) x=0 (B) z=0 (C) y=0 (D) none of these

The equation vecr = lamda hati + mu hatj represents :

The equation of y-axis are (A) x=0,y=0 (B) x=0,z=0 (C) y=0,z=0 (D) none of these

The equation to the normal to the curve y=sinx at (0,\ 0) is x=0 (b) y=0 (c) x+y=0 (d) x-y=0

The equation of the righat bisector plane of the segment joining (2,3,4) and (6,7,8) is (A) x+y+z+15=0 (B) x+y+z-15=0 (C) x-y+z-15=0 (D) none of these

The locus of a first degree equation in x,y and z is a (A) straighat line (B) plane (C) sphere (D) none of these

The equation vecr-2vecr.vecc+h=0, |vecc|gtsqrt(h) represents (A) circle (B) ellipse (C) cone (D) sphere

The line vecr=hati+hatj-hatk+lamda(3i-j) and vecr.=4hati-hastk+mu(2hati+3hatk) interset at the point (A) (0,0,0) (B) (0,0,1) (C) (0,-4-1) (D) (4,0,-1)

The equation of the plane whose intercepts on the axes are thrice of those made by the plane 2x-3y+6z-11=0 is (A) 6x-9y+18z-11=0 (B) 2x-3y+6z-33=0 (C) 2x-3y+6z+33=0 (D) none of these

The equation of the plane through the intersection of the plane a x+b y+c z+d=0\ a n d\ l x+m y+n+p=0 and parallel to the line y=0,\ z=0. (A) (b l-a m)y+(c l-a n)z+d l-a p=0 (B) (a m-b l)x+(m c-b n)z+m d-b p=0 (c) (n a-c l)d+(b n-c m)y+n d-c p=0 (D) None of these