Asked by tangocharliee | 12th Nov, 2009, 05:42: PM
Slope of a straight line = tan θ.
If we select any of the two lines as with slope 1/2 making an angle θ with x axis, then the other line can be,
Then the slope of the other line = tan (θ±π/4) = (tanθ±tanπ/4)/(1 - or + tanπ/4 tanθ),
is (1/2 - 1)/(1+1/2) = -1/3 or (1/2 + 1)/(1-1/2) = 3.
Answered by | 13th Nov, 2009, 03:01: PM
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