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Find the angle between the straight lines joining the origin to the point of intersection of `x^2+2x y+3y^2+4x+8y-11=0` and `3x-y=-2`

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Find the angle between the straight lines joining the origin to the point of intersection of 3x^2+5x y-3y^2+2x+3y=0 and 3x-2y=1

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