SOLUTION: The angle between the lines represented by x²+3xy+2y²=0 is

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Question 323138: The angle between the lines represented by x²+3xy+2y²=0 is
Answer by galactus(183) About Me  (Show Source):
You can put this solution on YOUR website!
If we solve the given quadratic for y, we get y=-x and y=-x/2.
I assume what is being asked is to find the angle between these two lines?.
There is a formula for finding the angle between two lines.
It is: arctan%28%28m2-m1%29%2F%281%2Bm1%2Am2%29%29
Where m1 and m2 are their respective slopes of -1 and -1/2.
arctan%28%28-1%2F2-%28-1%29%29%2F%281%2B%28-1%2F2%29%28-1%29%29%29=arctan%281%2F3%29=18.435
Is that what you were getting at?.