Question

2x+3y+kxy-4=0 Find the value of k

Answer 1

Answer:

k=+7 or-7

Step-by-step explanation:

a=2, b=3 , h=k/2 , p=pi/4

Let angle between lines is p

tan p=2(h^2-a.b)^1/2 /(a+b)

tan pi/4 = 2(k^2/4–6)^1/2 /(2+3)

1= {(k^2–24)^1^2}/5

(k^2–24)^1/2=5

k^2–24=25

k^2=49

k=+7,-7 , Answer.

Hope it hepls you...