Find the product of `-5x^2y ,-2/3x y^2z ,8/(15)x y z^2a n d-1/4zdot` Verify the result when `x=1, y=2\ a n d\ z=3.`

Find the product of -5x^(2)y,-(2)/(3)xy^(2)z,(8)/(15)xyz^(2)and-(1)/(4)z .Verify the result when x=1,y=2 and z=3 .

Find the angle between the plane: 2x-y+z=4\ a n d\ x+y+2z=3

Write the angle between the lines 2x=3y=z\ a n d\ 6x=-y=-4zdot

Find the angle between the plane: x+y-2z=3\ a n d\ 2x-2y+z=5 .

Find the angle between the plane: x-y+z=5\ a n d\ x+2y+z=9

Find the angle between the plane: 2x-3y+4z=1\ a n d-x+y=4.

Obtain the equation of the plane passing through the point (1, -3, -2) and perpendicular to the planes x+2y+2z=5\ a n d\ 3x+3y+2z=8.

The values of x, y, z for the equations x-y+z=1, 2x-y=1, 3x+3y-4z=2 are