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If veca=hati-2hatj+3hatk and vecb=-2hat...

If `veca=hati-2hatj+3hatk` and `vecb=-2hati+hatj-2hatk`, then the value of `|veca xx vecb|` is -

A

`sqrt(26)`

B

`3sqrt(6)`

C

`5sqrt(3)`

D

`4sqrt(6)`

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The correct Answer is:
A
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 7
  1. The equation of the line passing through the point (2, -3, 1) and para...

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  2. If the straight line joining the points (4, -3, 2) and (3, -1, 5) is p...

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  3. If veca=hati-2hatj+3hatk and vecb=-2hati+hatj-2hatk, then the value o...

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  4. A unit vector perpendicular to both the vectors hati+hatj and hatj+hat...

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  5. If the vectors vec alpha=hati+3hatj+hatk, vec beta=2hati-hatj-hatk an...

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  6. If |veca xx vecb|^2+(veca*vecb)^(2)=196 and |vecb|=2, then the value o...

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  7. If e^(y)+xy=e^(2) then the value of (d^(2)y)/(dx^(2)) at x=0 is -

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  8. Derivative of sin^(-1)x w.r.t. cos^(-1) sqrt(1-x^(2)) is -

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  9. If x=a(theta+sin theta), y=a(1-cos theta), then the value of (dy)/(d...

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  10. The equation ax^(2)+bx+c=0 has one real root between 0 and k. If 4a...

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  11. If lim(x to oo) [ (x^(3)+1)/(x^(2)+1)-(ax+b)]=2, then the values of a ...

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  12. Let f(x) be continuous in (-oo, oo) and f'(x) exists in (-oo, oo). If...

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  13. The value of lim(x to 0) (1-3x)^((3)/(x)) is equal to -

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  14. If y=2sin^(- 1)((x-2)/sqrt(6))-sqrt(2+4x-x^2) then prove that dy/dx at...

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  15. If f(x)=tan^(-1)((3x-x^(3))/(1-3x^(2))) and phi(x)=cos^(-1)((1-x^(2)...

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  16. If y=sec(tan^(-1)x), then (dy)/(dx) is equal to -

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  17. If y=e^(x+e^(x+e^(x+...oo)), then the value of (dy)/(dx) is -

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  18. If y=(x sin^(-1)x)/(sqrt(1-x^(2)))+logsqrt(1-x^(2)), then the value o...

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  19. For |x| lt 1, let y=1+x+x^(2)+…oo, then the value of (dy)/(dx)-y is e...

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  20. Observe the following statements : (i) f(x)=ax^(41)+bx^(-40) rArr (f'...

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