Angle between y axis and a straight line

Find the acute angle between z-axis and the straight line joining the points (3,2,3) and (-3,-1,5)

Find the acute angle between z-axis and the straight line joining the points (3,2,3) and (-3,-1,5).

Find the acute angle between x-axis and the straight line joining the points (1, 1, 3) and (3, 2, 1).

The acute angle between the z-axis and the straight line joining the points (3, 2, 3) and (-3, -1, 5) is -

Find the angles between the pairs of straight line x-y sqrt(3)=5 and sqrt(3)x+y=7

The angle between the pair of straight lines x^(2)-y^(2)-2y-1=0 is

The angle between the pair of straight lines x^(2)-y^(2)-2y-1=0 is

Angle between pair of straight line

The eccentricity of the ellipse which meets the straight line x/7+y/2= 1 on the x- axis and the straight line x/3-y/5=1 on the y-axis and whose axis lie along the axis of coordinate

The eccentricity of the ellipse which meets the straight line (x)/(7)+(y)/(2)1 on the x -axis and the straight line (x)/(3)-(y)/(5)=1 on the y -axis and whose axis lie along the axis of coordinate