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The line sin theta (x+2y 1) +cos theta(3...

The line `sin theta (x+2y 1) +cos theta(3x-y+2) =0` is equally inclined with the co-ordinate axes for two values of `theta` says `theta_1 and theta_2` If the value of `tan(theta_1+theta_2)` is equal to `m/n(O <= theta <= pi),(G.C.D)` of (m,n)=1), then `|m-n|` equals to

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