Find the slope of a line joining the given points `(-6,1)` and `(-3,2)`

Answer

B, D

Explanation

Eliminating n we have `(l^(2)+m^(2))-(l+m)^(2)=0`
`therefore 2lm=0`
When l=0 then m+n=0
`therefore l/0=m/1=n/-1`………(1)
When m=0 then `l+n=0`
`therefore l/1=m/0=n/-1` ………(2)
`therefore` D.R's are 0,1,-1 and 1,0,-1
`therefore costheta=(0.1+1.0+1)/(sqrt(1+1)sqrt(1+1))=1/2`
`therefore=pi/3`