Question

00:22
The angle between the pair of straight lines
x2 + 4y? – 7xy = 0, is​

Answer 1

Answer:

tan∅=√33/5

let , ax^2+2bxy+by^2=0

by using this formula ,tan∅=(2√b^2-ab/a+b)

a=1, b=4, 2b=-7=-7/2

tan∅=(2√49/4 -4)/5= (2√49-16/4 )/5

tan∅=(2√33/4)/5, = (2×1/2√33)/5

tan∅=√33/5