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Lines L1 and L2 have slopes m and n, res...

Lines `L_1` and `L_2` have slopes m and n, respectively, suppose `L_1` makes twice as large angle with the horizontal (mesured counter clockwise from the positive x-axis as does `L_2` and `L_1` has 4 times the slope of `L_2`. If `L_1` is not horizontal, then the value of the proudct mn equals.

A

` (sqrt(2))/(2) `

B

` -(sqrt(2))/(2) `

C

2

D

-2

Text Solution

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The correct Answer is:
C
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