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If vec Avec C and vec Bvec D are the dia...

If `vec Avec C` and `vec Bvec D` are the diagonals of the parallelogram `ABCD`, show that `vec Avec C+vec Bvec D = 2 vec Bvec C`.

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MODERN PUBLICATION-VECTOR-EXERCISE
  1. Let vec a is any vector than what is the value of (vec a.hat i)hat i+(...

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  2. What is the value of (hat i+hat j)×(hat j+hat k).(hat k+hat i)?

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  3. If vec Avec C and vec Bvec D are the diagonals of the parallelogram AB...

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  4. Find the area of the parallelogram whose adjacent sides are gives by t...

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  5. If vec(a) and vec(b) are two vectors such that |vec(a) + vec(b)| = |ve...

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  6. Determine the area of parallelogram whose adjacent sides are the vecto...

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  7. Prove that (vec a × vec b)^(2) = a^(2)b^(2)-(vec a . vec b)^(2).

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  8. Prove that (vec a × vec b).(vec c × vec d) = [[vec a.vec c,vec a.vec d...

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  9. Find a unit vector in direction of vec a-vec b, when vec a = 4 hat i +...

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  10. If vec a and vec b be perpendicular vectors, then prove that (vec a + ...

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  11. Find the value of lambda so that the three vectors are co-planar. (2,-...

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  12. Determine k such that a vector vec(r) is at right angles to each of th...

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  13. Find the scalar and vector projection of veca on vecb. veca = hati+hat...

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  14. Calculate the area of the triangle ABC (by vector method) where A(1,2,...

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  15. Prove that : |veca + vecb|le|veca|+|vecb|.

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  16. Show that vec a × (vec b+vec c) + vec b × (vec c+vec a) + vec c × (vec...

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  17. If vec(a) and vec(b) are unit vectors, then what is the angle between ...

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  18. Prove by vector method that the diagonals of a parallelogram bisect ea...

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  19. Prove by vector method that in a parallelogram, the line joining a ve...

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  20. If veca, vecb, vecc are mutually perpendicular vectors of equal magnit...

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