If the lines represented by `6x^(2)+41xy-7y^(2)=0` makes angle `alpha and beta` with X-axis, then `tanalphatimestanbeta`

If the lines represented by ax^(2)-bxy-y^(2)=0 makes angle alpha and beta with X-axis, then tan(alpha+beta)=

If the lines represented by x^(2)-4xy+y^(2)=0 makes angle alpha and beta with X-axis, then tan^(2)alpha+tan^(2)beta=

If the lines represented by the equation 6x^(2)+41xy-7y^(2)=0 make angles alpha and beta with X-axis, then tan alpha.tan beta=

If the lines represented by the equation 6x^(2)+41xy-7y^(2)=0 make angles alpha and beta with X-axis, then tan alpha.tan beta=

If the lines represented by the equation 6x^(2)+41xy-7y^(2)=0 make angle alpha " and " beta with x-axis, then tanalpha tanbeta=

If the lines represented by the equation ax^(2)-bxy-y^(2)=0 make angles alpha and beta with the X-axis, then tan(alpha+beta)=

If the lines represented by the equation ax^(2)-bxy-y^(2)=0 make angles alpha and beta with the X-axis, then tan(alpha+beta)=

Lines represented by x^(2)+7xy+2y^(2)=0 are

If the lines represented by the equation 2x^2-3xy+y^2=0 make angles alpha and beta with X-axis, then cot^2alpha+cot^2beta is equal to