Question

What is the angle between the line x + y = 1 and
x - y = 1?
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Answer 1

Answer:

0 degrees

Step-by-step explanation:

y=1-x (y=mx+c)  slope is -1  m1=-1

y=x-1   m2=1

angle between lines= tan z= |m1+m2/1-m1m2|

tanz= 1-1/1+1=0/2

hence z = tan inverse 0=0 degree

Answer 2

Answer:

the formula for angle between straight lines is

tan theta=m2-m1/1+m1m2

here

m1=-1

m2=1

1-(-1)/1-1

2/0

tan^-1(infinity)

90 degrees

Step-by-step explanation: