1.

Given two vectors veca=-hati + 2hatj + 2hatk and vecb =- 2hati + hatj + 2hatk

Answer»

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Solution :a. VECTOR `-3hati = 3hatj + 4hatk and hati + hatj` are coplanar with `veca and vecb`.
b. `vecaxxvecb=|{:(hati,hatj,HATK),(-1,2,2),(-2,1,2):}|`
`2hati-2hatj+3hatk`
c. if `vecc` is equally inclined to `veca and vecb` , then we must have `veca.vecc= vecb.vecc`.
which is true for vectors in options p,q,s
d. vector is forming a TRIANGLE with `veca and vecb`. THUS
`vecc= veca + vecb = -3hati + 3hatj + 4hatk`


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