Question

Calcule o angulo formado pelas retas y = 2 e x-y-1=0

Answer 1

y=2=> a=0.....x-y-1=0 => y=x-1 => m=1

tgx = m-a/1+m.a
tgx = 1-0/1+1.0
tgx = 1/1 = 1 ==> x=45° ✓