In ` A B C ,` let `L ,M ,N` be the feet of the altitudes. The prove that `sin(/_M L N)+sin(/_L M N)+sin(/_M N L)=4sinAsinBsinC`

Prove that l||m||n

If l,m and n are three straight lines such that l||m and l||n then prove that m||n .

If l ,\ m,\n are three lines such that l || m\ a n d\ n_|_l , prove that n_|_mdot

If l,m,n are direction cosines of the line then -l,-m,-n can be

If L+M+N=0 and L,M,N are rationals the roots of the equation (M+N-L)x^(2)+(N+L-M)x+(L+M-N)=0 are

The angle between the lines whose direction cosines are l, m, n and m-n, n-l, l-m is......

In a A B C , If L a n d M are points on A B a n d A C respectively such that L M B Cdot Prove that: a r ( A B M)=a r ( A C L)

In figure, sides L M and L N of L M N are extended to P and Q respectively. If x > y , show that L M > L N .

In a \ /_\A B C , If L\ a n d\ M are points on A B\ a n d\ A C respectively such that L M || B C . Prove that: a r\ (\ /_\L C M)=a r\ (/_\ L B M)

In a \ A B C , If L\ a n d\ M are points on A B\ a n d\ A C respectively such that L M B Cdot Prove that: a r\ (\ L C M)=a r\ ( L B M)