11. The acute angle between the pair of lines `x^2+2xycottheta+y^2=0` is

The acute angle between the pair of lines 2x^(2)+5xy+2y^(2)+3x+3y+1=0 is

Find the acute angle between the pair of lines given by : x^2 + 2xy - 4y^2 = 0

If theta is the acute angle between the pair of the lines x^(2)+3xy4y^(2)=0 then sin theta=

If the angle 2 theta is acute, then the acute angle between the pair of lines x^(2)(cos theta-sin theta)+2 x y cos theta+y^(2)(cos theta+sin theta)=0 is

If theta is the acute angle between the pair of lines 5x^2-8xy-y^2=0 then find cos theta

The acute angle between the lines x^(2)-2 x y sec alpha+y^(2)=0 is

If the angle alpha is acut, then the acute angle between the pair of staight lines x^2(costheta-sintheta)+2xycostheta+y^2(cos theta+sintheta)=0 is

If the acute angle between the pairs of lines 3x^2-7xy+4y^2=0 and 6x^2-5xy+y^2=0 be theta_1 and theta_2 respectively, then