Home
Class 12
MATHS
compute the following : (i) [{:(a,b),...

compute the following :
`(i) [{:(a,b),(-b,a):}]+[{:(a,b),(b,a):}]`
`(ii) [{:(a^(2)+b^(2),b^(2)+c^(2)),(a^(2)+c^(2),a^(2)+b^(2)):}]+[{:(2ab,2bc),(-2ac,-2ab):}]`
`(iii)[{:(-1,4,-6),(8,5,16),(2,8,5):}]+[{:(12,7,6),(8,0,5),(3,2,4):}]`
`(iv) [{:(cos^(2)x, sin^(2)x),(sin^(2)x,cos^(2)x):}]+[{:("sin"^(2),cos^(2)x),(cos^(2) x , sin^(2)x):}]`

Text Solution

Verified by Experts

The correct Answer is:
N/a

`(i) [{:(a,b),(-b,a):}]+[{:(a,b),(b,a):}]=[{:(a+a,b+b),(-b+b,a+a):}]=[{:(2a,2b),(0,2a):}]`
`(ii) [{:(a^(2)+b^(2),b^(2)+c^(2) ),(a^(2)+c^(2),a^(2)+b^(2)):}]+[{:(2ab,2bc),(-2ac,-2ab):}]`
`[{:(a^(2)+b^(2)+2ab,b^(2)+c^(2)+2bc),(a^(2)+c^(2)-2ac,a^(2)+b^(2)-2ab):}]`
`=[{:((a+b)^(2),(b+c)^(2)),((a-c)^(2),(a-b)^(2)):}]`
`(iii) [{:(-1,4,-6),(8,5,16),(2,8,5):}]+[{:(12,7,6),(8,0,5),(3,2,4):}]`
`=[{:(-1+12,4+7,-6+6),(8+8,5+0,16+5),(2+3,8+2,5+4):}]=[{:(11,11,0),(16,5,21),(5,10,9):}]`
`(iv) [{:(cos^(2)x,sin^(2)x),(sin^(2)x,cos^(2)x):}]+[{:(sin^(2)x,xos^(2)x),(cos^(2)x,sin^(2)x):}]`
`=[{:(cos^(2)x+sin^(2)x,sin^(2)x+cos ^(2)x),(sin^(2) x+cos^(2)x,cos^(2)x+sin^(2)x):}]`
`=[{:(1,1),( 1,1):}]`
Promotional Banner

Topper's Solved these Questions

  • MATRICES

    NAGEEN PRAKASHAN ENGLISH|Exercise Exercise 3.3|12 Videos
  • MATRICES

    NAGEEN PRAKASHAN ENGLISH|Exercise Exercise 3.4|18 Videos
  • MATRICES

    NAGEEN PRAKASHAN ENGLISH|Exercise Exercise 3.1|10 Videos
  • LINEAR PROGRAMMING

    NAGEEN PRAKASHAN ENGLISH|Exercise Miscellaneous Exercise|9 Videos
  • PROBABIILITY

    NAGEEN PRAKASHAN ENGLISH|Exercise Miscellaneous Exercise|19 Videos

Similar Questions

Explore conceptually related problems

int(sin^(8)x-cos^(8)x)/(1-2sin^(2)x cos^(2)x)dx

Compute the following:(i) [[a, b],[-b, a]]+[[a, b],[b ,a]] (ii) [[a^2+b^2, b^2+c^2],[a^2+c^2,a^2+b^2]]+[[2ab,2b c],[-2a c,-2a b]] (iii) [[-1 ,4,-6],[ 8 ,5, 16],[ 2, 8, 5]]+[[12 ,7, 6],[ 8, 0, 5],[ 3 ,2, 4]] (iv) [[cos^2x,sin^2x],[sin^2x,cos^2x]]+[[sin^2x,cos^2x],[cos^2x,sin^2x]]

Compute the following: [[cos^2x, sin^2x],[sin^2 x, cos^2 x]]+[[sin^2x, cos^2 x],[cos^2 x, sin^2 x]]

int(sin x cos x)/(a^(2)sin^(2)x+b^(2)cos^(2)x)dx

Solve 4 cos^(2)x+6 sin^(2)x=5 .

int(sinx. cos x)/(a^(2) cos^(2) x+b^(2) sin^(2) x)dx

If a,b,c, and c, are the roots of x^(2)-4x+3=0,x^(2)-8x+15=0 and x^(2)-6x+5=0, [{:(a^(2),+c^(2),a^(2)+b^(2)),(b^(2),+c^(2),a^(2)+c^(2)):}]+[{:(2ac,-2ab),(-2bc,-2ac):}]

Evaluate : int(sin2x)/(a^2sin^2x+b^2cos^2x)dx

Prove that : int_(0)^(pi) (x)/(a^(2) cos^(2) x+b^(2) sin^(2) x)dx =(pi^(2))/(2ab)

Evaluate: int(sin2x)/(a^2sin^2x+b^2cos^2x)\ dx

NAGEEN PRAKASHAN ENGLISH-MATRICES-Exercise 3.2
  1. A=[{:(2,4),(3,2):}],B=[{:(1,3),(-2,5):}],C=[{:(-2,5),(3,4):}] find ...

    Text Solution

    |

  2. compute the following : (i) [{:(a,b),(-b,a):}]+[{:(a,b),(b,a):}] (...

    Text Solution

    |

  3. compute the indicated products . (i) [{:(a,b),(-b,a):}][{:(a,-b),(b,...

    Text Solution

    |

  4. if A=[{:(1,2,-3),(5,0,2),(1,-1,1):}],B=[{:(3,-1,2),(4,2,5),(2,0,3):}]a...

    Text Solution

    |

  5. If A=[[2/3, 1, 5/3],[ 1/3, 2/3, 4/3] ,[7/3, 2, 2/3]]and B=[[2/3, 3/5, ...

    Text Solution

    |

  6. Simplify: cos theta[{:(costheta,sintheta),(-sintheta,costheta):}]+si...

    Text Solution

    |

  7. Find X and Y, if(i) X+Y=[7 0 2 5]and X-Y=[3 0 0 3](ii) 2X+3Y=[2 3 4 0]...

    Text Solution

    |

  8. Find X if Y=[3, 2, 1 ,4] and 2X+Y=[1, 0, -3, 2] .

    Text Solution

    |

  9. Find X and Y,if 2[{:(1,3),(0,x):}]+[{:(y,0),(1,2):}]=[{:(5,6),(1,8...

    Text Solution

    |

  10. Solve the equation for x, y, z and t, if 2[x, z , y, t]+3[1, -1 , 0 ,...

    Text Solution

    |

  11. ifx[{:(2),(3):}]+y[{:(-1),(1):}]=[{:(10),(5):}],find the values of x ...

    Text Solution

    |

  12. Given 3[x y z w]-[x6-1 2w]+[4x+y z+w3] , find the values of x, y, z an...

    Text Solution

    |

  13. If f(x) = [(cos x , - sinx,0),(sinx,cosx,0),(0,0,1)] then show f(x) . ...

    Text Solution

    |

  14. Show that(i) [5-1 6 7][2 1 3 4]!=[2 1 3 4][5-1 6 7](ii) [1 2 3 0 1 0 1...

    Text Solution

    |

  15. If f(x)=x^2-5x+6. Find f(A),if A=[(2,0,1),(2,1,3),(1,-1,0)].

    Text Solution

    |

  16. if A =[{:(1,0,2),(0,2,1),(2,0,3):}] , prove that A^3-6A^2+7A+2I=0

    Text Solution

    |

  17. If A A=[3-2 4-2]and I=[1 0 0 1], find k so that A^2=k A-2I.

    Text Solution

    |

  18. Let A=[0-tan(alpha//2)tan(alpha//2)0] and I be the identity matrix ...

    Text Solution

    |

  19. A trust fund has Rs. 30000 that must be invested in two different t...

    Text Solution

    |

  20. The bookshop of a particular school has 10 dozen chemistry books, 8...

    Text Solution

    |