he angle between two lines y-2x-9=0 and x+2y= -7 is
a) 60 degree b)30degree c)90degree and d)45 degree
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he angle between two lines y-2x-9=0 and x+2y= -7 is
a) 60 degree b)30degree c)90degree and d)45 degree
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B) 30 degree
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