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Let `veca,vecb,vecc` be the three vectors of magnitude 5, 3, I respectively. If each one is perpendicular to the sum of other two vectors, prove that `|veca+vecb+vecc|`=`sqrt35`.

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The correct Answer is:
`sqrt(35)`
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ACCURATE PUBLICATION-VECTOR ALGEBRA-QUESTIONS CARRYING 2 MARKS
  1. If |veca|=2, |vecb|=3 and |vecc|=4 and each of them is perpendiculart...

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  2. If |veca|=7, |vecb|=1 and |vecc|=5 and each of them is perpendicular ...

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  3. Let veca,vecb,vecc be the three vectors of magnitude 5, 3, I respectiv...

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  4. Find the scalar projection of : veca=2hati-hatj-3hatk on vecb=3hati-5h...

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  5. Find the scalar projection of : veca=7hati+3hatj+6hatk on vecb=5hati-2...

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  6. Find the scalar projection of vecb on veca where : veca=2hati-2hatj+ha...

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  7. Find the scalar projection of vecb on veca where : veca=2hati+2hatj+ha...

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  8. Find the scalar projection of vecb on veca where : veca=2hati+2hatj-ha...

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  9. The projection of the vector veca=2hati+3hatj+2hatk on the vector vecb...

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  10. If veca=2hati-2hatj+hatk,vecb=hati+2hatj-2hatk and vecc=2hati-hatj+4ha...

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  11. If veca=2hati-2hatj+hatk,vecb=hati+2hatj-2hatk and vecc=2hati-hatj+4ha...

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  12. If veca=2hati-2hatj+hatk , vecb=2hati-hatj+4hatk , and vecc=hati+2hatj...

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  13. Show that the vectors : 2hati-hatj+hatk,hati-3hatj-5hatk and 3hati-4ha...

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  14. With the help of vector method, prove that,cosC=(a^2+b^2-c^2)/(2ab)

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  15. With the help of vector method, prove that,cosA=(b^2+c^2-a^2)/(2bc)

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  16. Prove that, in any triangle ABC, cos B=(c^2+a^2-b^2)/(2ca).

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  17. Using vector method, prove that in a triangle, a=b cosC+ c cosB (proje...

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  18. Use vectors to prove that in triangleABC : b=c cos A+a cos C.

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  19. Prove that in any triangle ABC,c=a cos B+b cosA

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  20. Using vector method, prove that the angle in a semi-circle is a right...

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