Show that vectors
`vecA= hati - 5hatj` and `vecB= 2hati-10 hatj`
are parallel to each other.

Show that vectors vecA= 3hati+ hatj+ hatk and vecB= hati+ 2hatj- 5hatk are perpendicular to each other.

Show that the vectors veca=2hati+3hatj and vecb=4hati+6hatj are parallel.

Show that the vector vecA = -6hati + 9hatj - 12 hatk and vec = 2 hati - 3hatj + 4hatk are parallel to each other.

The value of 'lambda' for which the vectors : veca=3hati+hatj-2hatk and vecb=hati-9hatj+lambdahatk are perpendicular to each other is :

For which value of lambda the vector veca = 2hati+hatj-2hatk and vecb = hati-3hatj+lambdahatk are perpendicular to each other :

The value of 'lambda' for which the vectors : veca=2hati+3hatj-hatk and vecb=4hati+6hatj+lambdahatk are parallel is :

If vecA = 2 hati + 3 hatj and vecB = 2 hati +1 hatj , find the angle between vecA and vecB .

If veca = hati + hatj+hatk, vecb = 2hati-hatj+3hatk and vecc = hati-2hatj+hatk , find a unit vector parallel to the vector 2veca - vecb + 3vecc