Home
Class 12
MATHS
If vecx xx vecy=veca, vecy xx vecz=vecb,...

If `vecx xx vecy=veca, vecy xx vecz=vecb, vecx.vecb=gamma, vecx.vecy=1 and vecy.vecz=1 ` then find x,y,z in terms of `veca,vecb and gamma.`

Text Solution

Verified by Experts

The correct Answer is:
b

Given
`vecx xx vecy=veca` (i)
`vecy xx vecz=vecb` (ii)
`vecx.vecb =gamma` (iii)
`vecx.vecy=1` (iv)
`vecy .vecz=1` (v)
from (ii) , `vecx.(vecy xx vecz) =vecx . Vecb=gamma Rightarrow [vecx vecy vecz] = gamma`
From (i) and (ii) , `(vecx xx vecy) xx (vecy xx vecz) =veca xx vecb`
` [vecx vecy vecz]-[vecy vecy vecz] = veca xx vecb`
` or vecy = (veca xx vecb)/ gamma`
Also from (i), we get ` (vecx xx vecy) xx vecy =veca xx vecy `
` or (vecx.vecy) vecy- (vecy.vecy)vecx =veca xx vecy`
`or vecx = (1//|vecy|^(2))(vecy - veca xx vecy)`
`gamma^(2)/(|vecaxx vecb|^(2))[(vecaxxvecb)/gamma-(vecaxx(vecaxxvecb))/gamma]`
`gamma/(|veca xx vecb|^(2))[veca xx vecb-vecaxx (veca xx vecb)]`
Also from (ii) , `(vecy xx vecz)xxvecy = vecb xx vecy`
`or |vecy|^(2)vecz-(vecz.vecy)vecy= vecbxxvecy`
`or vecz= 1/(|vecy|^(2))[vecy+vecb xx vecy]`
`gamma/(|vecaxxvecb|^(2))[vecaxxvecb +vecb xx (veca xx vecb)]`
Promotional Banner

Topper's Solved these Questions

  • DIFFERENT PRODUCTS OF VECTORS AND THEIR GEOMETRICAL APPLICATIONS

    CENGAGE PUBLICATION|Exercise Martrix - match type|10 Videos
  • DIFFERENT PRODUCTS OF VECTORS AND THEIR GEOMETRICAL APPLICATIONS

    CENGAGE PUBLICATION|Exercise Integer type|17 Videos
  • DIFFERENT PRODUCTS OF VECTORS AND THEIR GEOMETRICAL APPLICATIONS

    CENGAGE PUBLICATION|Exercise Reasoning type|8 Videos
  • DETERMINANTS

    CENGAGE PUBLICATION|Exercise All Questions|262 Videos
  • DIFFERENTIAL EQUATIONS

    CENGAGE PUBLICATION|Exercise All Questions|578 Videos

Similar Questions

Explore conceptually related problems

Vectors vecx,vecy,vecz each of magnitude sqrt(2) make angles of 60^0 with each other. If vecx xx(vecy xx vecz) = veca, vecy xx( vecz xx vecx)=vecb and vecx xx vecy=vecc, find vecx, vecy, vecz in terms of veca, vecb and vecc .

If veca xx (vecbxx vecc)= (veca xx vecb)xxvecc then

If veca .vecb =beta and veca xx vecb = vecc ," then " vecb is

vecrxxveca=vecbxxveca,vecrxxvecb=vecaxxvecb,vecanevec0,vecbnevec0,vecanelambdavecb and veca is not perpendicular to vecb , then find vecr in terms of veca and vecb .

If |veca|=|vecb|=|veca+vecb|=1 then find the value of |veca-vecb|

If vecA+ vecB+vecC =0, then show that vecA xx vecB= vecBxxvecC= vecCxx vecA .

If veca, vecb, vecc and vecd are unit vectors such that (vecaxx vecb).(veccxxvecd)=1 and veca.vecc=1/2 then

If veca = 2veci+3vecj-veck, vecb =-veci+2vecj-4veck and vecc=veci + vecj + veck , then find the value of (veca xx vecb).(vecaxxvecc)

Let veca=-hati-hatk,vecb =-hati + hatj and vecc = i + 2hatj + 3hatk be three given vectors. If vecr is a vector such that vecr xx vecb = vecc xx vecb and vecr.veca =0 then find the value of vecr .vecb .

veca =2veci+3vecj-2veck vecb =4veci-vecj+5veck Find veca xx vecb

CENGAGE PUBLICATION-DIFFERENT PRODUCTS OF VECTORS AND THEIR GEOMETRICAL APPLICATIONS -Comprehension type
  1. Vectors vecx,vecy,vecz each of magnitude sqrt(2) make angles of 60^0 w...

    Text Solution

    |

  2. Vectors vecx,vecy,vecz each of magnitude sqrt(2) make angles of 60^0 w...

    Text Solution

    |

  3. If vecx xx vecy=veca, vecy xx vecz=vecb, vecx.vecb=gamma, vecx.vecy=1 ...

    Text Solution

    |

  4. If vecx xx vecy=veca, vecy xx vecz=vecb, vecx.vecb=gamma, vecx.vecy=1 ...

    Text Solution

    |

  5. Vectors vecx,vecy,vecz each of magnitude sqrt(2) make angles of 60^0 w...

    Text Solution

    |

  6. Given two orthogonal vectors vecA and vecB each of length unity. Let v...

    Text Solution

    |

  7. Given two orthogonal vectors vecA and vecB each of length unity. Let v...

    Text Solution

    |

  8. Given two orthogonal vectors vecA and VecB each of length unity. Let v...

    Text Solution

    |

  9. Let veca= 2 hati + 3hatj - 6hatk, vecb = 2hati - 3hatj + 6hatk and vec...

    Text Solution

    |

  10. Let veca= 2 hati + 3hatj - 6hatk, vecb = 2hati - 3hatj + 6hatk and vec...

    Text Solution

    |

  11. Let veca= 2 hati + 3hatj - 6hatk, vecb = 2hati - 3hatj + 6hatk and vec...

    Text Solution

    |

  12. Consider a triangular pyramid ABCD the position vectors of whose agula...

    Text Solution

    |

  13. Consider a triangular pyramid ABCD the position vectors of whose agula...

    Text Solution

    |

  14. Consider a triangular pyramid ABCD the position vectors of whose agula...

    Text Solution

    |

  15. Vertices of a parallelogram taken in order are A, ( 2,-1,4) , B (1,0,-...

    Text Solution

    |

  16. Vertices of a parallelogram taken in order are A( 2,-1,4)B(1,0,-1...

    Text Solution

    |

  17. Vertices of a parallelogram taken in order are A, ( 2,-1,4) , B (1,0,-...

    Text Solution

    |

  18. Let vecr be a position vector of a variable point in Cartesian OXY pla...

    Text Solution

    |

  19. Let vecr be a position vector of a variable point in Cartesian OXY pla...

    Text Solution

    |

  20. Let vecr be a position vector of a variable point in Cartesian OXY pla...

    Text Solution

    |