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Prove that the vectors vec a= hat i- 3 h...

Prove that the vectors `vec a= hat i- 3 hat j - 5 hat k `, `vec b= 2 hat i- hat j+ hat k` and `vec c= hat i+ 2 hat j+ 6 hat k` from of a right angled triangle.

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PRADEEP PUBLICATION-VECTORS-EXERCISE
  1. Find the projection of the vector vec a = 2 hat i+ 3 hat j+ 2 hat k on...

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  2. Find the projection of thevector hat i+ 3 hat j+ 7 hat k on the vector...

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  3. Prove that the vectors vec a= hat i- 3 hat j - 5 hat k , vec b= 2 hat ...

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  4. If A,B,C have position vectors (0,1,1),(3,1,5),(0,3,3) respectively, p...

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  5. Prove Cauchy- Schwarz inequality |quad vec a* vec b|<|quad vec a||quad...

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  6. For any two vectors vec a and vec b, prove that (vec a* vec b)^ 2 le |...

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  7. If |quad vec a|=1, |quad vec b|=1 and |quad vec a+ vec b|=1, prove tha...

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  8. If |quad vec a+ vec b|=|quad vec a- vec b|, prove that vec a and vec b...

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  9. If (vec a+ vec b)* (vec a- vec b)=0, show that |quad vec a|=|quad vec ...

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  10. If vec a and vec b are any two vectors, then prove that |quad vec a+ v...

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  11. Prove that two proper vectors vec a and vec b are the right angles iff...

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  12. If vec a,vec b,vec c are three non-coplanar vectors and vec d* vec a ...

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  13. Find a vector vec c such that vec c*(hat i+ hat j)= 2, vec c* (hat i- ...

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  14. Find a vector vec c such that vec c. hat i = vec c. hat j= vec c . hat...

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  15. If vec c is normal to vec a and vec b, show that vec cis normal to ve...

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  16. If vec a, vec b, vec c are three vectors such that |quad vec a|=5,|,qu...

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  17. If vec a,vec b,vec c are mutually perpendicular unit vectors , then f...

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

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  19. If vec a+ vec b+ vec c= 0, show that the angletheta between vec a and ...

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

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