The angle between the two lines \[y-2x=9\] and \[x+2y=-\ 7,\] is [RPET 1981, 85, 86; MP PET 1984]

The angle between the two lines \[y-2x=9\] and \[x+2y=-\ 7,\] is

1.	The angle between the two lines \[y-2x=9\] and \[x+2y=-\ 7,\] is [RPET 1981, 85, 86; MP PET 1984]
A.	\[{{60}^{o}}\]
B.	\[{{30}^{o}}\]
C.	\[{{90}^{o}}\]
D.	\[{{45}^{o}}\]
Answer» D. \[{{45}^{o}}\]

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The angle between the two lines \[y-2x=9\] and \[x+2y=-\ 7,\] is [RPET 1981, 85, 86; MP PET 1984]

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