The angle between a line `x=1,y=2 and y+1=0, z=0` is (A) `0^0` (B) `30^0` (C) `60^0` (D) `90^0`

The angle between the plane 3x+4y=0 and the line x^2+y^2=0 is (A) 0^0 (B) 30^0 (C) 60^0 (D) 90^0

The angle between the plane 3x+4y=0 and the line x^2+y^2=0 is (A) 0^0 (B) 30^0 (C) 60^0 (D) 90^0

The angle between the lines 2x=3y=-z and 6x=-y=-4z is (A) 0^0 (B) 90^0 (C) 45^0 (D) 30^0

The angle between the line x=1=y=2 =z/1 and x/1=y=-1= z=0 is

The angle between the plane 3x+4y=0 and z-axis is (A) 0^0 (B) 30^0 (C) 60^0 (D) 90^0

The angle between the plane 3x+4y=0 and z-axis is (A) 0^0 (B) 30^0 (C) 60^0 (D) 90^0

Find the acute angle between the lines x=y: z=0 and x=0z=0

The angle between the planes 4x + 8y + z- 8 = 0 and y + z -4 = 0 is (A) 30 ° (B) 45 ° (C) 60 ° (D) 90 °

Let the straight lines x+y-2=0, 2x-y+1=0 and px+qy-r=0 be concurrent and l_1 and l_2 be the two members of the family of lines 2px+2qy+4r=0 which are nearest and farthest from origin : Now answer the question : The angle between lines L_1 and l_2 is : (A) 45^0 (B) 60^0 (C) 90^0 (D) none of these