Question

the angle between the lines X + Y is equals to 1 and x - y is equals to 2 is

Answer 1

y=mx+c

x+y=1

y= -x+1

m1= -1

x-y=2

y=x+2

m2 = 1

tan a =|m2-m1| / |1+m1m2|

=1+1/ 1-1

= infinite

=tan 90

Angle b/w given lines is 90 .