Home
Class 12
MATHS
If the vectors veca = 2hati + 3hatj +-6h...

If the vectors `veca` = `2hati + 3hatj +-6hatk` and `vecb` = `alphahati-hatj +2hatk` are parallel, then `alpha` = ______

Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER 2012

    MODERN PUBLICATION|Exercise EXERCISE|37 Videos
  • SAMPLE PAPER 2014

    MODERN PUBLICATION|Exercise EXERCISE|35 Videos

Similar Questions

Explore conceptually related problems

If veca = hati+2hatj+hatk , vecb = 2hati- 2hatj + 2hatk and vecc = hati + 2hatj + hatk then

Find the angle between the vectors vecp=3hati+hatj+2hatk and vecQ=hati-2hatj+3hatk .

If veca = hati+2hatj-hatk , vecb = hati+hatj+2hatk , vecc = 2hati-hatj then

The diagonals of a parallelogram are given by veca =2hati - 3hatj + 5hatk and vecb = -2hati + 2hatj + 2hatk , Determine the area of the parallelogram .

Vectors vecP=hati+2hatj+3hatk and vecQ=2hati+ahatj-5hatk are perpendicular .Find a.

If veca = 3hati+3hatj+hatk and vecb = -2hati+hatj-2hatk then what is the unit vector parallel to veca+vecb

Find the scalar projection of the vector veca = 3hati+6hatj + 9hatk on vecb = 2hati+2hatj - hatk .

Find the vector projection of veca=hati-hatj+hatk on vecb=3hati+hatj+3hatk.

MODERN PUBLICATION-SAMPLE PAPER 2013-EXERCISE
  1. Write the value of int(frac{π}{4})^(frac{π}{2}) sin^(5)xcosxdx.

    Text Solution

    |

  2. Write the degree of the differential equation In((d^(2)y)/(dx^(2)))...

    Text Solution

    |

  3. If the vectors veca = 2hati + 3hatj +-6hatk and vecb = alphahati-hatj ...

    Text Solution

    |

  4. Write theequationofthelinepassing through the point (4, —6,1) and para...

    Text Solution

    |

  5. What is the image of the point (—2, 3, —5) respect to the zx-plane ?

    Text Solution

    |

  6. Write the matrix which when added to the matrix [{:(2,-3),(-4,7):}]gi...

    Text Solution

    |

  7. write the value of c(1)^(8) + c(2)^(8) +.....+ c(8)^(8).

    Text Solution

    |

  8. If P(A) = 0.6, P(B) = 0.4 and P(A nn B) = 0.2, then fimd the value of ...

    Text Solution

    |

  9. Find the derivative of x^(sinx) w.r.t.x.

    Text Solution

    |

  10. Differentiate sin^(-1) ((2X)/(1+X^(2))) with respect to cos^(-1) ((1-X...

    Text Solution

    |

  11. Find the slope of the tangent to the curve x=2(t-sin t) and y = 2(1...

    Text Solution

    |

  12. If cos y = x cos(a+y) then prove that dy/dx = (cos^2(a+y))/sin a

    Text Solution

    |

  13. Find the extreme values of the function y = X + 1/x.

    Text Solution

    |

  14. Find the intervals where the following functions are (a) increasing an...

    Text Solution

    |

  15. Integrate : int (sin6x + sin4x) / (cos6x + cos4x) dx.

    Text Solution

    |

  16. Evaluate the following integrals : int(dx)/(x[(logx)^(2)+25])

    Text Solution

    |

  17. Integrate : int sin^(-1)xdx.

    Text Solution

    |

  18. Evaluate int0^(pi/2)(sqrt(sinx))/(sqrt(sinx)+sqrt(cos x))dx

    Text Solution

    |

  19. solve , dy/dt = e^((2t)+(3y)).

    Text Solution

    |

  20. solve , dy/dx + y = e^(-x).

    Text Solution

    |