[" 119.If the lines "px^(2)-qxy-y^(2)=0" makes the angles "alpha" and "beta" with "X" -axis,then "],[" the value of "tan(alpha+beta)" is "]

If the lines px^(2) - qxy -y^(2) = 0 make the angles alpha and beta with X-axis, then find the value of tan(alpha + beta) .

If the component lines whose combined equation is px^(2)-qxy-y^(2)=0 make the angles alphaand beta with x-axis , then find the value of tan (alpha+beta) .

If the component lines whose combined equation is px^(2)-qxy-y^(2)=0 make the angles alphaand beta with x-axis , then find the value of tan (alpha+beta) .

If the component lines whose combined equation is px^(2)-qxy-y^(2)=0 make the angles alphaand beta with x-axis , then find the value of tan (alpha+beta) .

If the component lines whose combined equation is px^(2)-qxy-y^(2)=0 make the angles alphaand beta with x-axis , then find the value of tan (alpha+beta) .

If the two lines ax^(2)+2hxy+by^(2)=a make angles alpha and beta with X-axis,then : tan(alpha+beta)=

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 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)=

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=