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Using vectors, find the area of triangle...

Using vectors, find the area of triangle whose vertices are (2,1,1),(2,3,1) and (1,3,4).

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The correct Answer is:
`sqrt(26)`sq. units
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ACCURATE PUBLICATION-VECTOR ALGEBRA-QUESTIONS CARRYING 2 MARKS
  1. Using vectors, find the area of the triangle having vertices A (3, 2, ...

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  2. Using vectors find the area of the triangle whose vertices arc (0, 1 ,...

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  3. Using vectors, find the area of triangle whose vertices are (2,1,1),(2...

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  4. If veca+vecb+vecc=vec0 show that vecaxxvecb=vecbxxvecc=veccxxveca. Int...

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  5. If A, B and C are the vertices of a triangle ABC, prove sine formula t...

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  6. In a triangle OAC, if B is the mid point of side AC and vec(OA)=veca,v...

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  7. Find a unit vector parallel to the sum of the vectors hati+hatj+hatk a...

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  8. Find a vector of magnitude 5 units, and parallel to the resultant of t...

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  9. If the sum of two unit vectors is a unit vector, show that the magnitu...

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  10. Show that the points (-2,3,5), (1,2,3) and (7,0,-1) are collinear.

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  11. If a unit vector veca, makes angles pi/3with hati, pi/4wih hatj and...

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  12. Find a vector of magnitude 5sqrt(2) units which makes an angle of (pi)...

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  13. Write the value of the cosine of the angle which the vector veca=hati+...

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  14. If veca=2hati+2hatj+3hatk,vecb=-hati+2hatj+hatk and vecc=3hati+hatj ar...

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  15. The vectors veca=3hati+xhatj and vecb=2hati+hatj+yhatk are mutually pe...

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  16. Find the values of lamda for which the angle between the vectors veca=...

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  17. If veca and vecb are two unit vectors such that veca+vecb is also a un...

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  18. If veca and vecb are two vectors such that |veca+vecb|=|veca|, then pr...

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  19. Write the projection of the vector 7hati+hatj+4hatk on the vector 2hat...

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  20. If veca=hati+2hatj-hatk, vecb=2hati+hatj+hatk and vecc=5hati-4hatj+3ha...

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