1.

Out of the following …………. Is the unit vector in the direction of (3hati+4hatj-5hatk)+2(2hati+hatj).

Answer»

`(7)/(sqrt(110))HATI+(6)/(sqrt(110))HATJ-(5)/(sqrt(110))HATK`
`-(7)/(sqrt(110))hati-(6)/(sqrt(110))hatj-(5)/(sqrt(110))hatk`
`(7)/(sqrt(110))hati-(6)/(sqrt(110))hatj-(5)/(sqrt(110))hatk`
`(5)/(sqrt(110))hati+(6)/(sqrt(110))hatj-(5)/(sqrt(110))hatk`

Answer :A


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