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Question Number 75444 by vishalbhardwaj last updated on 11/Dec/19

Find the angle b/w the lines  whose direction cosines are given  by the equations l + m + n = 0  , l^2  + m^2  − n^2  = 0 ??

$$\mathrm{Find}\:\mathrm{the}\:\mathrm{angle}\:\mathrm{b}/\mathrm{w}\:\mathrm{the}\:\mathrm{lines} \\ $$$$\mathrm{whose}\:\mathrm{direction}\:\mathrm{cosines}\:\mathrm{are}\:\mathrm{given} \\ $$$$\mathrm{by}\:\mathrm{the}\:\mathrm{equations}\:{l}\:+\:{m}\:+\:{n}\:=\:\mathrm{0} \\ $$$$,\:{l}^{\mathrm{2}} \:+\:{m}^{\mathrm{2}} \:−\:{n}^{\mathrm{2}} \:=\:\mathrm{0}\:?? \\ $$$$ \\ $$

Commented by vishalbhardwaj last updated on 11/Dec/19

sir I corrected it.

$$\mathrm{sir}\:\mathrm{I}\:\mathrm{corrected}\:\mathrm{it}. \\ $$

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