Home
Class 12
MATHS
ua n dv are two non-collinear unit ve...

`ua n dv` are two non-collinear unit vectors such that `|( hat u+ hat v)/2+ hat uxx hat v|=1.` Prove that `| hat uxx hat v|=|( hat u- hat v)/2|dot`

Promotional Banner

Topper's Solved these Questions

  • VECTOR

    MOTION|Exercise EXERCISE - 1|42 Videos
  • VECTOR

    MOTION|Exercise EXERCISE - 2 ( LEVEL -I)|21 Videos
  • TRIGONOMETRIC EQUATION

    MOTION|Exercise EXERCISE 4|10 Videos

Similar Questions

Explore conceptually related problems

u and v are two non-collinear unit vectors such that |(widehat u+hat v)/(2)+widehat u xxhat v|=1. Prove that |widehat u xxhat v|=|(widehat u-hat v)/(2)|

hatu and hat v are two non-collinear unit vectors such that |(hatu+hatv)/2+hatuxxvecv|=1 . Prove that |hatuxxhatv|=|(hatu-hatv)/2|

Write a unit vector perpendicular to hat i+ hat j\ a n d\ hat j+ hat kdot

The deges of a parallelopied are of unit length and are parallel to non- coplanar unit vector hat(a), hat(b) , hat(c ) such that hat(a) , hat(b) = hat(b), hat( c)=hat(c ), hat(a) = .(1)/(2). Then the volume of the parallelopiped is

Let hat u= hat i+ hat j , hat v= hat i- hat ja n d hat w= hat i+2 hat j+3 hat kdot If hat n is a unit vector such that hat udot hat n=0a n d hat vdot hat n=0, then find the value of | hat wdot hat n|dot

Let two non-collinear unit vector hat a a n d hat b form an acute angle. A point P moves so that at any time t , the position vector O P(w h e r eO is the origin) is given by hat acost+ hat bsintdotW h e nP is farthest from origin O , let M be the length of O Pa n d hat u be the unit vector along O Pdot Then (a) hat u=( hat a+ hat b)/(| hat a+ hat b|)a n dM=(1+ hat adot hat b)^(1//2) (b) hat u=( hat a- hat b)/(| hat a- hat b|)a n dM=(1+ hat adot hat )^(1//2) (c) hat u=( hat a+ hat b)/(| hat a+ hat b|)a n dM=(1+2 hat adot hat b)^(1//2) (d) hat u=( hat a- hat b)/(| hat a- hat b|)a n dM=(1+2 hat adot hat b)^(1//2)

If vec a and vec b are non-zero and non-collinear vectors, then vec ax vec b=[ vec a vec b hat i] hat i+[ vec a vec b hat j] hat j+[ vec a vec b hat k] hat k vec adot vec b=( vec adot vec i)( vec adot hat i)( vec bdot hat j)+( vec adot hat j) ( vec bdot hat j) + ( vec adot hat k)( vec bdot hat k) If vec u= hat a-( hat adot hat b) hat b and hat v= hat ax hat b , then | vec v|=| vec u| If vec c= vec ax( vec ax vec b) , then vec cdot vec a=0

If hat i ,\ hat j ,\ hat k\ are unit vectors, then hat idot hat j=1 b. hat idot hat i=1 c. hat ixx hat j=1 d. hat ixx( hat jxx hat k)=1

The edges of a parallelopiped are of unit length and are parallel to non-coplanar unit vectors hat(a), hat(b), hat(c ) such that hat(a).hat(b)=hat(b).hat(c )=hat(c ).hat(a)=(1)/(3) . Then, the volume of the parallelopiped is :-

MOTION-VECTOR -EXERCISE - 4 ( LEVEL-II)
  1. ua n dv are two non-collinear unit vectors such that |( hat u+ hat ...

    Text Solution

    |

  2. If the vectors veca,vecb,vecc form the sides BC,CA and AB respectively...

    Text Solution

    |

  3. Let the vectors veca, vecb,vecc and vecd be such that (vecaxxvecb)xx(v...

    Text Solution

    |

  4. If veca, vecb and vecc are unit coplanar vectors, then the scalar trip...

    Text Solution

    |

  5. If veca =hati + hatj-hatk, vecb = - hati = - hati + 2hatj + 2hatk and ...

    Text Solution

    |

  6. Given that vectors veca and vecb asre perpendicular to each other, fin...

    Text Solution

    |

  7. If veca, vecb and vecc are three unit vectors such that veca xx (vecb ...

    Text Solution

    |

  8. The diagonals of a parallelogram are given by vectors 2hati+3hatj-6hat...

    Text Solution

    |

  9. Find the all the values of lamda such that (x,y,z)!=(0,0,0)and x(hati+...

    Text Solution

    |

  10. Two vertices of a triangle are at -hati+3hatj and 2hati+5hatj and its ...

    Text Solution

    |

  11. If veca, vecb, vecc are unit vectors, then |veca-vecb|^2+|vecb-vec|^2+...

    Text Solution

    |

  12. Let veca=hati-hatk, vecb=xhati+hatj+(1-x)hatk and vecc=yhati+xhatj+(1+...

    Text Solution

    |

  13. Let vec A(t) = f1(t) hat i + f2(t) hat j and vec B(t) = g(t)hat i+g2(...

    Text Solution

    |

  14. If veca and vecb are two unit vectors such that veca+2vecb and 5veca-4...

    Text Solution

    |

  15. Let vecV=2hati+hatj-hatk and vecW=hati+3hatk. It vecU is a unit vector...

    Text Solution

    |

  16. The value of a so that the volume of the paralelopiped formed by hati+...

    Text Solution

    |

  17. A unit vector int eh plane of the vectors 2hati+hatj+hatk, hati-hatj+h...

    Text Solution

    |

  18. If veca=veci+vecj+veck, veca.vecb=1 and vecaxxvecb=vecj-veck, then vec...

    Text Solution

    |

  19. If veca,vecb,vecc,vecd are four distinct vectors satisfying the condit...

    Text Solution

    |

  20. Let veca=hati + 2hatj +hatk, vecb=hati - hatj +hatk andvecc= hathatj-h...

    Text Solution

    |

  21. Let vecA be a vector parallel to the of intersection of planes P1 and ...

    Text Solution

    |