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Prove that : sin(A- B) = sin A cos B -co...

Prove that : `sin(A- B) = sin A cos B -cos A sin B`.

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MODERN PUBLICATION-VECTORS-Exercise
  1. Prove that the normal to the plane containing three point whose positi...

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  2. Find the unit vectors perpendicular to the plane ABC, where the positi...

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  3. Prove that : sin(A- B) = sin A cos B -cos A sin B.

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  4. Find the moment about (1,-1,-1) of the force 3hati+4hatj-5hatk acting ...

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  5. The force represented by 3hati+2hatk is acting through the point 5hati...

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  6. Find the moment about the point hati+2hatj-hatk of a force represented...

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  7. The force represented by 5hati+hatk is acting through the point 9hati-...

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  8. A force vecF=4hati+hatk acts through point A(0,2,0). Find the moment v...

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  9. Let vecF=2hati+4hatj+3hatk at the point P with position vector hati-ha...

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  10. A force vecF=3hati+2hatj-4hatk is applied at the point (1,-1,2).Find t...

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  11. Two unlike forces of equal magnitudes hatj+2hatk and -hatj-2hatk are a...

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  12. A force of 3 units acts through the point (4,-1,7) in the direction of...

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  13. Find the moment about the point (3,4,5) of the force through the point...

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  14. The moment of the couple formed by forces 5hati+hatk and -5hati-hatk a...

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  15. Find the vector moment of the forces : hati+2hatj-3hatk: 2hati+3hatj+4...

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  16. Classify the following quantities as vector or scalar : (i) Time perio...

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  17. Find veca*(vecbxxvecc) if : veca=2hati+hatj+3hatk,vecb=-hati+2hatj+hat...

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  18. Show that veca*(vecaxxvecb)=0 for any pair veca,vecb of vectors.

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  19. If veca=7hati-2hatj+3hatk, vecb=hati-hatj+2hatk, vecc=2hati+8hatj, the...

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  20. Show that the following vectors are coplanar : veca=hati-2hatj+3hatk,v...

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