3sinl-cosl=1
tgL=t
3t/sqrt(t^2+1)-1/sqrt(t^2+1)=1
(3t-1)/sqrt(t^2+1)=1
t^2+1=1+9t^2-6t
8t^2=6t
t1=0
t2=6/8=3/4
tgL=0
tgL=3/4
3sinl-cosl=1
tgL=t
3t/sqrt(t^2+1)-1/sqrt(t^2+1)=1
(3t-1)/sqrt(t^2+1)=1
t^2+1=1+9t^2-6t
8t^2=6t
t1=0
t2=6/8=3/4
tgL=0
tgL=3/4