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veca=3hati-5hatj and vecb=6hati+3hatj ar...

`veca=3hati-5hatj and vecb=6hati+3hatj` are two vectors and `vec c` is a vector such that `vecc=vecaxxvecb` then `|veca|:|vecb|:|vecc|`

A

`sqrt34: sqrt45: sqrt39`

B

`sqrt34 : sqrt45: 39`

C

`34 : 39 : 45`

D

`39 : 35 : 34`

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The correct Answer is:
B
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DISHA PUBLICATION-VECTOR ALGEBRA-EXERCISE -1 : CONCEPT BUILDER
  1. For any vector veca the value of (vecaxxhati)^2+(vecaxxhatj)^2+(vecaxx...

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  2. If (veca xx vecb) xx vecc = vec a xx (vecb xx vecc), where veca, vecb ...

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  3. veca=3hati-5hatj and vecb=6hati+3hatj are two vectors and vec c is a v...

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  4. Vectors veca and vec b are inclined at an angle theta = 120^@ . If |ve...

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  5. For any vector vecp , the value of 3/2 { |vecp xx hati|^2 + |vecp ...

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  6. If (vec a xx vec b)^2 + (veca .vecb)^2 = 676 and |vecb| = 2, then |ve...

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  7. What is the interior acute angle of the parallelogram whose sides are ...

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  8. Area of rectangle having vertices A, B , C and D with position vector ...

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  9. Let veca,vecb and vecc be non-zero vectors such that no two are collin...

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  10. Let veca, vecb, vec c such that |veca| = 1 , |vecb| = 1 and |vec c | ...

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  11. |(a xx b).c | = |a||b||c| , if

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  12. If veca = hati +hatj , vecb = 2hatj - hatk " and " vecr xx veca = ve...

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  13. Let veca=hati-hatk, vecb=xhati+hatj+(1-x)hatk and vecc=yhati+xhatj+(1+...

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  14. If veca, vecb, vec c are three non coplanar vectors , then the value ...

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  15. Let vec(A) = 2hat(i) + hat(k), vec(B) = hat(i) + hat(j) + hat(k) and ...

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  16. A particle is acted upon by constant forces 4hati +hatj - 3hatk and 3h...

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  17. Force hati + 2hatj -3hatk , 2hati + 3hatj + 4hatk and -hati - hatj + ...

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  18. The resultant moment of three forces hati + 2hatj -3hatk, 2hati + 3hat...

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  19. If ((veca xx vec b ) xx (vec c xx vec d)).(vec a xx vec d)= 0 , then ...

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  20. A force vecF = (hati - 8hatj - 7hatk) is resolved along the mutually p...

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