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If veca and vecb are two vectors such th...

If `veca` and `vecb` are two vectors such that `|veca|=10,|vecb|=15" ""and"" "veca.vecb=75sqrt(2),`find the angle between `veca`and `vecb`.

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The correct Answer is:
`(pi)/(4)`
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PREMIERS PUBLISHERS-Vector Algebra -I-Solution to Exercise(8.3)
  1. Find the value or values of m for which m (hati+hatj+hatk) is a unit v...

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  2. Find veca.vecb when veca=hati-2hatj+hatk" ""and"" " vecb=3hati-4hatj...

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  3. Find the value lambda for which the vectors veca and vecb are perpendi...

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  4. Find the value lambda for which the vectors veca and vecb are perpendi...

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  5. If veca and vecb are two vectors such that |veca|=10,|vecb|=15" ""and"...

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  6. Find the angle between the vectors hati-hatj" ""and"" "hatj-hatk.

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  7. Find the angle between the vectors 2hati+3hatj-6hatk" "and 6hati-3ha...

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  8. If veca,vecb,vecc are three vectors such that veca+2vecb+vecc=vec0 and...

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  9. Show that the vectors veca=2hati+3hatj+6hatk,vecb=6hati+2hatj-3hatk, "...

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  10. Show that the vectors -hati-2hatj-6hatk,2hati-hatj+hatk" "and -hati+3h...

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  11. If |veca|=5,|vecb|=6,|vecc|=7 and veca+vecb+vecc=vec0, find veca.vecb+...

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  12. Show that the points (2,-1,3), (4,3,1) and (3,1,2) are collinear.

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  13. If veca,vecb are unit vectors and theta is the angle between them, sho...

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  14. If veca,vecb are unit vectors and theta is the angle between them, sho...

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  15. If veca,vecb are unit vectors and theta is the angle between them, sho...

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  16. Let vec a,vecb,vecc be three vectors such that |veca|=3,|vecb|=4,|vecc...

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  17. Find the projection of the vector hati+3hatj+7hatk on the vector 2hati...

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  18. Find lambda, when the projection of veca=lambdahati+hatj+4hatk on vecb...

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  19. Three vectors veca,vecb and vecc are such that |veca|=2,|vecb|=3,|vecc...

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