Question 7.

7. Equation of two equal sides of a triangle are the lines 7x + 3y - 20 = 0 and 3x + 7y - 20 = 0  and third side passes through the point (-3,3) then the equation of third side can be-
(A) x + y = 0
(B) x - y + 6 = 0
(C) x + 3 = 0
(D)  y = 3

apply tan thita = mod of m2-m1/1+m1m2
for both equation and equate them     we know one slope , angle thita must be same since two sides are equal so apply the formula for both and then equate.

we will get a quadratic in another slope but there are four possible values since there is a mod and solve
solve 2 quadratics, in one u will get complex no.s
and in another u will get 1, -1.

just check options where 1, and -1 are the slopes and also check if (-3,3 ) satisfies this equation or not