Prove that the following vectors are at righat angle: `2hati+5hatj+hatk, 3hati-2hatj+hatk`

Prove that the following vectors are at righat angle: 2hati+5hatj+hatk, 3hati-2hatj+4hatk

Prove that the following vectors are at righat angle: 2hati-hatj+hatk ,hati-3hatj+5hatk

Prove that the following vectors are at righat angle: 2hati-hatj+hatk ,hati-3hatj+5hatk

Show that the following vectors are coplanar : 2hati-hatj+hatk,hati-3hatj-5hatk,3hati-4hatj-4hatk .

Show that the following vectors are coplanar : hati-hatj+hatk,6hati-hatk and 4hati+2hatj-3hatk .

Show that the following vectors are coplanar : 3hati-2hatj+4hatk,6hati+3hatj+2hatk . 5hati+7hatj+3hatk . 2hati+2hatj+5hatk .

Find the angle between the following pairs of vectors 3hati+2hatj-6hatk, 4hati-3hatj+hatk , hati-2hatj+3hatk, 3hati-2hatj+hatk

Find the angle between the following pairs of vectors 3hati+2hatj-6hatk, 4hati-3hatj+hatk , hati-2hatj+3hatk, 3hati-2hatj+hatk

Prove that the vectors 2hati-hatj+hatk , hati-3hatj-5hatk , 3hati-4hatj-4hatk are the sides of a right angled triangle.