Question

If A is the acute angle between planes 2x+y+2z+6=0 and 2x- 3y+6z+18=0 then cos A is given by

Answer 1

Answer:

1.1.2 If l, m, n are the direction cosines of a line, then l2 + m2 + n2 = 1 ... lines, then the acute angle θ between the two lines is given by ... and passing through a given point (x1, y1, z1) is a (x – x1) + b (y – y1) + c ... ( ˆi + 3 ˆj ) – 6 = 0 and r ... The plane 2x – 3y + 6z – 11 = 0 makes an angle sin–1(α) with x-axis.

Step-by-step explanation: