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If | vec a+ vec b|=60 ,\ | vec a- vec b|...

If `| vec a+ vec b|=60 ,\ | vec a- vec b|=40\ | vec b|=46 , \ ` `Then find | vec a|

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RD SHARMA ENGLISH-SCALAR OR DOT PRODUCT-All Questions
  1. If the sum of two unit vectors is a unit vector prove that the magni...

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  2. If vec a ,\ vec b ,\ vec c are three mutually perpendicular unit ve...

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  3. If | vec a+ vec b|=60 ,\ | vec a- vec b|=40\ | vec b|=46 , \ Then fin...

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  4. Show that the vector hat i+ hat j+ hat k is equally inclined with the...

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  5. Show that the vector vec a=1/7(2 hat i+3 hat j+6 hat k),\ vec b=1/7(...

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  6. For any tow vectors a\ a n d\ b show that ( vec a+ vec b) ( vec a- vec...

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  7. If vec a=2 hat i- hat j+ hat k ,\ vec b= hat i+ hat j-2 hat k\ a n d...

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  8. If vec p=5 hat i+lambda hat j-3 hat k\ a n d\ vec q= hat i+3 hat j-5...

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  9. If vecalpha=3 hat i+4 hat j+5 hat k\ a n d\ vecbeta=2 hat i+ hat j-4...

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  10. If either vec a= vec0\ or\ vec b= vec0\ t h e n\ vec adot vec b= ve...

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  11. Show that the vectors vec a=3 hat i-2 hat j+ hat k ,\ vec b= hat i-3...

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  12. If vec a=2 hat i+2 hat j+3 hat k ,\ vec b=- hat i+2 hat j+ hat k\ a ...

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  13. Find the angles of a triangle whose vertices are A(0,\ -1,\ -2),\ B(3,...

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  14. Find the magnitude of two vectors vec a\ a n d\ vec b having the sam...

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  15. Show that the points whose position vectors are vec a=4 hat i-3 hat j...

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  16. If A ,\ B ,\ C have position vectors (0, 1, 1), (3, 1, 5), (0, 3, 3...

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  17. Find the projection of vec b+ vec c\ on\ vec a\ ,\ w h e r e\ vec a...

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  18. If vec a=5 hat i- hat j-3 hat k\ a n d\ vec b= hat i+3 hat j-5 hat k...

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  19. A unit vector vec a makes angles pi/4\ a n d\ pi/3 with hat i\ a n d...

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  20. If two vectors vec a\ a n d\ vec b are such that | vec a|=2,\ | vec ...

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