What is the angle between the lines x+y=1 and x-y=1 in terms of pie?
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x+y=1
slope of line m= -1
x-y=1
slope of line = 1
angle between lines = A..
tan A= (m-n)/(1+mn)
tan A= (-1-1)/(1+1*(-1))
tan A= -2/0
tan A= infinity
tan A= tan π/2
A = π/2 ,,,angle between lines
slope of line m= -1
x-y=1
slope of line = 1
angle between lines = A..
tan A= (m-n)/(1+mn)
tan A= (-1-1)/(1+1*(-1))
tan A= -2/0
tan A= infinity
tan A= tan π/2
A = π/2 ,,,angle between lines
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