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. Solve x^2ydx-(x^3+y^3)dy=0.

    Text Solution

    |

  2. Prove by vector method that in any triangle ABC, a/sinA=b/sinB=c/sinC.

    Text Solution

    |

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

    Text Solution

    |

  4. If the mapping f and g are given by f= {(1,2), (3, 4), (5, 6), (7, 8)}...

    Text Solution

    |

  5. Prove that cos^(-1)(frac[b+acosx][a+bcosx])=2tan^(-1)(sqrt(frac[a-b][a...

    Text Solution

    |

  6. Show that the line y=mx+c touches the curve x^2/a^2-y^2/b^2 = 1 if c^2...

    Text Solution

    |

  7. Show that the shrtest distance of the point (0, 8a) from the curve ax^...

    Text Solution

    |

  8. Show that the curves y = 2^(x) and y = 5^(x) intersect at an angle tan...

    Text Solution

    |

  9. Prove the following: [[(b+c)^2,a^2,bc],[(c+a)^2,b^2,ca],[(a+b)^2,c^2...

    Text Solution

    |

  10. Find the inverse of the following matrix using elementary transformati...

    Text Solution

    |

  11. If A is a singular matrix, then what is A(adjA)?

    Text Solution

    |

  12. Give example of a function which is increasing in (-oo,2) and (3,oo) a...

    Text Solution

    |

  13. If the direction angles of a line are alpha=30^@ and beta=60^@, find t...

    Text Solution

    |

  14. Give an example of a relation which is not a function.

    Text Solution

    |

  15. Write the integrating factor of the differential equation dy/dx(x+y+1)...

    Text Solution

    |

  16. tan{(1/2)sin^(-1)((2x)/(1+x^(2)))+1/2cos^(-1)((1-y^(2))/(1+y^(2)))}.

    Text Solution

    |

  17. What is the angle between vecaand vecb if abs(veca+vecb)=abs(veca-vecb...

    Text Solution

    |

  18. If M=[(1,1,1),(1,1,1),(1,1,1)],then what is M^50 ?

    Text Solution

    |

  19. Write the value x for which d/dxsin(sin^-1x)=1

    Text Solution

    |

  20. What is the value of int(-1)^(1)ln(frac[4-x][4+x])dx?

    Text Solution

    |