Find the direction cosines of the vector...

Find the direction cosines of the vector `hati +2hatj + 3hatk`

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The direction cosines of the vector 3hati-4hatj+5hatk are

Find the unit vector in the direction of thd sum of the vectors 2hati+2hatj+5hatk" and "2hati+hatj-3hatk .

Find the projection of the vector veca = 2 hati + 3hatj + 2hatk on the vector vecb = hati +2hatj +hatk

Find the direction cosines of the resultant of the vectors (hati+hatj+hatk),(-hati+hatj+hatk),(hati-hatj+hatk) and (hati+hatj-hatk) .

Find a unit vector in the direction of the resultant of the vectors (hati+2hatj+3hatk),(-hati+2hatj+hatk) and (3hati+hatj) .

Find the unit vector in the direction of the vector = veca= hati+hatj+ 2hatk

Write the direction ratio's of the vector veca=hati+hatj-2hatk and hence calculate its direction cosines.

Write the direction ratios of the vector vec(r)=hati-hatj+2hatk and hence calculate its direction cosines.