Answers

  • Brainly User
2014-08-06T21:37:25+05:30
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
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2014-08-07T14:43:14+05:30
We knw that line equ. is y=mx+c, after comparisn those lines, here is m1=-1, m2=1 than angle tanz=m1+m2/1-m1m2 tanz=0, z=0
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