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Questions  

If the vectors (i^+j^+k^) and 3i^ form two sides of a triangle, the area of the triangle is

a
3unit
b
23unit
c
32unit
d
32unit

detailed solution

Correct option is C

: Area of triangle =12ABsinθ=|A×B|2A×B=(i^+j^+k^)×3i^=-3k^+3j^|A×B|=(-3)2+(3)2=32Area =322=32unit

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