Home
Class 12
MATHS
If a line in the space makes angles alph...

If a line in the space makes angles `alpha, beta`  and `gamma`  with the coordinate axes, then find the value of `cos2alpha + cos2 beta + cos 2 gamma + sin^(2) alpha + sin^(2) beta + sin^(2) gamma`.

Promotional Banner

Topper's Solved these Questions

  • MATRICES DETERMINANTS PROBABILITY

    USHA PUBLICATION|Exercise EXERCISE|59 Videos
  • PRACTICE PAPER

    USHA PUBLICATION|Exercise PRACTICE PAPER|95 Videos

Similar Questions

Explore conceptually related problems

A line makes angles alpha, beta, gamma, delta with the four main diagonals of a cube. Prove that cos^2alpha+cos^2beta+cos^2gamma+cos^2delta=4/3

If alpha,beta,gamma be direction angles of a line, what is the value of sin^2alpha+sin^2beta+sin^2gamma .

USHA PUBLICATION-MODEL QUESTION SET-MODEL QUESTION SET
  1. Show that the semivertical angle of a cone of given slant height is ta...

    Text Solution

    |

  2. If a=2hati+hatk,b=hati+hatj+hatkandc=4hati-3hatj+7hatk, then find the ...

    Text Solution

    |

  3. If a line in the space makes angles alpha, beta  and gamma  with the c...

    Text Solution

    |

  4. If x,y,z are positive and are the pth, qth and rth terms of a G.P. the...

    Text Solution

    |

  5. If A=[[0,-tan(alpha/2)],[tan(alpha/2),0]] show that (I+A) =(I-A)[[c...

    Text Solution

    |

  6. Prove that abs((a,b,c),(a^2,b^2,c^2),(bc,ca,ab))=(a-b)(b-c)(c-a)(ab+bc...

    Text Solution

    |

  7. Prove that tan{(pi)/(4)+(1)/(2) "cos"^(-1)(a)/(b)}+tan{(pi)/(4)-(1)/(2...

    Text Solution

    |

  8. int(x^2+1)/(x^4+x^2+1)dx

    Text Solution

    |

  9. Show that int0^1(Inx)/sqrt(1-x^2)dx=pi/2In1/2

    Text Solution

    |

  10. Solve the following differential equations (1-x^2)(dy)/(dx)+2xy= x s...

    Text Solution

    |

  11. If A is a non-singular square matrix of order n, then what is abs(adj ...

    Text Solution

    |

  12. Write the subinterval of (0,pi) in which sin (x+pi/4) is increasing.

    Text Solution

    |

  13. Find least non negative integer r such that 1936xx8789 -= r"(mod4)"

    Text Solution

    |

  14. What is the number of independent constants in the equations of a plan...

    Text Solution

    |

  15. What is the antiderivative of 5^(5+x)?

    Text Solution

    |

  16. What is the order of the matrix B if [2 3 5 -1] B=[1 3 2 5 -4 1] .

    Text Solution

    |

  17. What is abs(veca-vecb)=if abs(veca)=3,abs(vecb)=4 and abs(veca+vecb)=5...

    Text Solution

    |

  18. Find the principal value of sin^1(sin"(2pi)/3)

    Text Solution

    |

  19. What is the value of d/dxint150^300(x^3+3x^2)^3dx ?

    Text Solution

    |

  20. What is the value of d/dx[lnsin^(-1){cos((pi-2e^x)/2)}] ?

    Text Solution

    |