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A unit vector perpendicular to 3i + j +...

A unit vector perpendicular to 3i + j +2 k and 2i-j + k is

A

`(3i-j-5k)/(sqrt(35))`

B

`(3i+j-5k)/(sqrt(35))`

C

`(-3i+j+5k)/(sqrt(35))`

D

`(3i+j+5k)/(sqrt(35))`

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The correct Answer is:
B
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KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER 10-MATHEMATICS
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  5. If tan A=(1)/(3 ) and tan B=(2)/(7) , then cot (A-B)=

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  6. If (cos A )/( a ) =(cos B)/(b)=(cos C)/(c) then the DeltaABC is

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  8. |(1)/((2+i)^(2))-(1)/((2-i)^(2))|=

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  9. (1+i)^(4)+(1-i)^(4)=

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