Find the acute angle between the pair of lines represented by `x(cosalpha-ysinalpha)^2=(x^2+y^2)sin^2alpha`

Find the angle between the lines represented by x^2+2x ysectheta+y^2=0

Find the acute angle between the planes 2x-3y+5z=1 and x-y-z=7 .

Find the acute angle between the following lines. 2x=3y=-zand6x=-y=-4z

Distance between the pair of lines represented by the equation x^(2)– 6xy +9y^(2)+ 3x - 9y -4 = 0 is

Find the angle between the lines 3x^(2)-10xy-3y^(2)=0 :

Find the angle between the pair of tangents from the point (1,2) to the ellipse 3x^2+2y^2=5.

Find the angle between the pair of straight lines given by (a^(2)-3b^(2))x^(2)+8ab xy+(b^(2)-3a^(2))y^(2)=0

Find the point of intersection of the pair of straight lines represented by the equation 6x^2+5x y-21 y^2+13 x+38 y-5=0.

Find the acute angle between the planes vecr.(2hatỉ+2hatj+2hatk)=11 and 4x-2y + 2z =15